What is the force of a 3 kg skateboard accelerating at a rate of 4m/s2? Plug in the numbers: Force = mass x acceleration
According to Darwin, an organism that is very successful at living and reproducing has a high level of: A). Genetic Equilibrium B). Altruistic Ability C). Fitness D). Hormones
Answer:
Hormones because without hormones there will no living humans on the world because two people having intercourse together they can make another human being
Cells that live in environments where oxygen is present only a small amount of the time have two options to survive. They can be obligate anaerobes, which are poisoned by oxygen and do full cellular respiration with an electron transport chain that ends in a different molecule than oxygen (such as sulfur.) Alternatively, they can be facultative anaerobes that do full cellular respiration with oxygen when oxygen is available but do fermentation with glycolysis when oxygen is not available. Full cellular respiration makes 32 ATP per glucose. Glycolysis makes only 2 ATP per glucose. Write out which option you think is better in an environment that only occasionally (rarely) contains oxygen, obligate or facultative anaerobe, and defend your answer.
by defending the answer is that aerobic respiration is used by oxygen but anaerobic respiration is not used by oxygen also plants they do survive at night but human being cannot breathe the same air with plants at night because oxygen take place but at the daytime we use carbon dioxide this is how I do understand in my understanding
PLEASE HELP ASAP I WILL MARK AS BRAINLIEST!
Give an example of a chemical reaction that is caused when reactants cool.
Answer: iron and oxygen combining to make rust. vinegar and baking soda combining to make sodium acetate, carbon dioxide and water.
Explanation:
The energy needed for the changes in the water cycle to take place comes
from__.
A. wind
B.green plants
C.nitrogen
D.the sun
one characteristic of plasmodium and other members of the group it belongs to (such as the causative agents of toxoplasmosis and cryptosporidiosis) is
The one characteristic of Plasmodium and other members of the group it belongs to (such as the causative agents of toxoplasmosis and cryptosporidiosis) is that they are all unicellular eukaryotic organisms that reproduce asexually by mitosis.
Plasmodium, which causes malaria, is a unicellular eukaryotic organism, which means it is made up of a single cell with a nucleus and other organelles, similar to other eukaryotic cells. Toxoplasmosis is caused by the parasite Toxoplasma gondii, which is also a unicellular eukaryote.
Cryptosporidiosis is caused by the unicellular parasite Cryptosporidium parvum, which is another unicellular eukaryotic organism. All of these organisms reproduce asexually by mitosis, which means that the parent cell divides into two identical daughter cells. This type of reproduction is different from sexual reproduction, in which two cells combine their genetic material to create a new organism.
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Compare and contrast the structure and function of DNA and RNA.
▪ Identify the bases used in DNA and RNA and how they pair – classify
each as a purine or pyrimidine
Answer:
DNA has a double- helix structure which means it has two strands. The DNA strands are made from sugar (Deoxyribonucleic), phosphates and nitrogenous bases. There are 4 nitrogenous bases, 2 purine and 2 pyrimidine. The 2 purine bases are Adenine and Guanine. The pyrimidine bases are Thymine and Cytosine. DNA gives our genes.
RNA is a single strand unlike DNA. The strands are made from sugar (ribonucleic), phosphate and the nitrogenous bases. There are 4 nitrogenous bases 2 purine and 2 pyrimidine. The 2 purine bases are Adenine and Guanine. However, the 2 pyrimidine bases are Uracil and Cytosine. The function of RNA is to contribute to releasing proteins based on our rRNA and tRNA and mRNA. This process is known as RNA and transcription.
Explanation:
__________ information on where and when a gene will be transcribed during development; usually upstream (before) of the coding region; includes the promoter.
Regulatory information on where and when a gene will be transcribed during development; usually upstream (before) of the coding region; includes the promoter.
Regulatory information is the information that specifies where and when a gene will be transcribed during development, generally located upstream of the coding region, and includes the promoter. A promoter is a regulatory region of DNA located upstream of a gene that initiates gene transcription and therefore plays a crucial role in gene expression. Transcription factors, small molecules, or environmental factors activate or repress the promoter, affecting the level of gene expression.
The gene promoter is a crucial element in gene expression, and the right promoters must be located in the appropriate place and at the proper time to regulate gene expression. Regulatory sequences upstream of the gene also have a significant impact on gene expression, allowing for fine-tuning of gene expression levels at the transcriptional level.
Therefore, the regulatory information includes the promoter and specifies where and when a gene will be transcribed during development.
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in beta oxidation of linoleic acid, what is the cost in total atps for the presence of the two double bonds compared to the saturated carbon chain stearic acid?
When stearic acid is subjected to beta-oxidation, it passes through 8 cycles, creating 8 molecules of acetyl-CoA.
Each beta-oxidation cycle results in the production of acetyl-CoA, which may then enter citric acid cycle to create ATP. The number of beta-oxidation cycles necessary to thoroughly oxidise fatty acid accounts for a difference in ATP output among saturated and unsaturated fatty acids, such as stearic acid and linoleic acid with two double bonds. A saturated fatty acid containing 18 carbon atoms is called stearic acid. Stearic acid is subjected to beta-oxidation eight times, creating eight molecules of acetyl-CoA.
Each acetyl-CoA molecule in citric acid cycle may provide roughly ten ATP molecules, for a total of about 80 ATP molecules. Linoleic acid goes through nine cycles of beta-oxidation, yielding nine molecules. The ATP yield per beta-oxidation cycle is slightly lower than stearic acid because each double bond requires an extra step. Therefore, linoleic acid's beta-oxidation produces a slightly lower total ATP production than stearic acid's.
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Suppose you coated the leaves of a plant with petroleum jelly. How would the plant's rate of transpiration be affected?
Answer:
The rate of transpiration would decrease
Explanation:
the petroleum jelly would block the stomata of the leaves resulting in decreased transpiration rates
Petroleum jelly would inhibit the loss of moisture out of the stomata cells. Therefore, the rate of transpiration would be decreased.
What is transpiration?Transpiration exists the procedure of water movement via a plant and its evaporation from aerial parts, such as leaves, stems, and flowers. Water exists essential for plants but only a small amount of water brought up by the roots is utilized for growth and metabolism. The remaining 97–99.5% exists lost by transpiration. An example of transpiration exists when a plant absorbs water in its roots.
Hence, Petroleum jelly would inhibit the loss of moisture out of the stomata cells. Therefore, the rate of transpiration would be decreased.
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What would happend if weeds are
not removed from the field?
Answer:
they would die
Explanation:
Which of the following techniques would be best for observing the bacterial nucleoid? a. Scanning electron microscopy b. Dark field microscopy with fluorescently labeled DNA C. Bright field microscopy with Gram stained cells d. Fluorescence microscopy using a fluorescent DNA-staining dye 9. Justify your answer to question 8 in 1-2 sentences. In your justification, clearly explain why at least one of the incorrect answers is wrong
Fluorescence microscopy using a fluorescent DNA-staining dye would be the best technique, option (d) is correct.
Fluorescence microscopy using a fluorescent DNA-staining dye would be the best technique for observing the bacterial nucleoid. The bacterial nucleoid is the region within the bacterial cell where the genetic material, including DNA, is located. Fluorescent DNA-staining dyes, such as DAPI (4',6-diamidino-2-phenylindole) or SYTOX, specifically bind to DNA and emit fluorescence when exposed to specific wavelengths of light.
This technique allows for specific visualization of the bacterial nucleoid within the cell. The fluorescence signal emitted by the DNA-staining dye can be detected and captured using a fluorescence microscope, enabling researchers to observe the structure and organization of the bacterial nucleoid, option (d) is correct.
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The complete question is:
Which of the following techniques would be best for observing the bacterial nucleoid?
a. Scanning electron microscopy
b. Dark field microscopy with fluorescently labeled DNA
c. Bright field microscopy with Gram stained cells
d. Fluorescence microscopy using a fluorescent DNA-staining dye
.Which of the following statements is true about active transport? Group of answer choices
a. It is needed only for the transport of polar molecules.
b. The transported species can move against its concentration gradient.
c. It is exergonic.
d. It must be regulated by phosphorylation
Answer: The correct answer is b. The transported species can move against its concentration gradient.
Explanation:
Active transport moves substances against their concentration gradient and requires energy, typically ATP. It is not limited to polar molecules and does not necessarily require phosphorylation for regulation.
The true statement about active transport is b. The transported species can move against its concentration gradient.
Active transport is a cellular process that allows the movement of substances across a cell membrane against their concentration gradient, from an area of lower concentration to an area of higher concentration. This movement of molecules or ions against the concentration gradient requires the expenditure of energy in the form of ATP.
In contrast to passive transport processes such as diffusion or facilitated diffusion, which move substances down their concentration gradient without requiring energy, active transport allows cells to maintain concentration gradients and selectively transport molecules or ions against their concentration gradients.
Therefore, option b is the correct statement that reflects the characteristic of active transport where the transported species can move against its concentration gradient.
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Explain how organisms in both of the ecosystems are dependent on their environmental interactions with other living things and with nonliving factors.
Answer:
Explanation:Organisms, and populations of organisms, are dependent on their environmental interactions both with other living things and with nonliving factors. ... Mutually beneficial interactions, in contrast, may become so interdependent that each organism requires the other for survival.
The organism that considered for an ecosystem that should be dependent on the environmental interactions should be explained below,
Environmental interactions:The organism and the organism population should be based on the environmental interactions along with the other living things also even with the non-living things of factors.
On the other hand, Mutually beneficial interactions should be considered as the independent where each and every organism should needed other for the survival purpose.
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Can someone please help I need it for finals to study
Answer: *CFS*?
1) Biodiversity is the variety of living organisms on Earth, including the diversity of species, genes, and ecosystems.
2) The destruction of ecosystems can lead to a decline in species populations, ultimately resulting in a loss of biodiversity.
3) Habitat loss and poaching of wild animals both generally lead to a decrease in biodiversity. Habitat loss means that ecosystems are destroyed or altered, which can result in the loss of species and genetic diversity. Poaching of wild animals can cause the decline or even extinction of certain species, which can have ripple effects throughout the ecosystem and lead to a reduction in biodiversity. Creating protected ecosystems, on the other hand, can lead to an increase in biodiversity. By preserving and protecting natural habitats, ecosystems can remain intact, and species can continue to thrive. Protected areas can also provide a sanctuary for threatened or endangered species, allowing them to recover and potentially increase in population size. Overall, protected ecosystems can play a crucial role in maintaining and enhancing biodiversity.
4) Degradation is the process of breaking down or deteriorating, typically resulting in a decline in quality, value, or condition.
5) Reducing fishing pressure on threatened and endangered marine species is generally a beneficial action. Overfishing can have significant negative impacts on fish populations and the overall health of marine ecosystems, and can even lead to the extinction of certain species. By reducing fishing pressure on threatened and endangered species, we can help to protect these species from further decline and allow their populations to recover. This can lead to a more sustainable and healthy marine ecosystem with greater biodiversity. Breeding diseases and parasites that can transfer to wild fish is generally a form of degradation. Introducing diseases and parasites to wild fish populations can have significant negative impacts on the health and survival of these species. It can also disrupt the balance of the ecosystem and affect the overall biodiversity of the area. In addition, diseases and parasites can spread beyond the target species, potentially causing harm to other aquatic organisms and even to humans who consume contaminated fish. Therefore, it is important to take measures to prevent the spread of diseases and parasites in aquatic environments and to promote the health of wild fish populations. Creating jobs in coastal communities and using other fish species to feed farmed fish can have both beneficial and degrading aspects, depending on the specific circumstances. On the one hand, creating jobs in coastal communities can be beneficial by providing employment opportunities for local residents and contributing to the economic growth of the area. This can help to reduce poverty and improve the standard of living for people living in these communities. On the other hand, some forms of aquaculture (fish farming) can have negative impacts on the environment, such as pollution from fish waste and the use of antibiotics and other chemicals. In addition, using other fish species to feed farmed fish can contribute to overfishing and the depletion of wild fish populations, which can have negative impacts on marine ecosystems and biodiversity. Therefore, it is important to carefully consider the potential environmental impacts of aquaculture and to implement sustainable practices that minimize negative impacts while maximizing the benefits. This might include using alternative feed sources that are less reliant on wild fish, adopting best practices for waste management and water quality control, and ensuring that farming practices are conducted in an environmentally responsible manner. By doing so, it may be possible to create jobs and support economic growth in coastal communities while also maintaining the health and biodiversity of marine ecosystems.
What does it mean to be Resilient?Being resilient means having the ability to adapt and recover in the face of adversity, stress, or challenging circumstances. Resilience is the ability to bounce back and regain one's footing after experiencing setbacks or difficulties. Resilience is not about avoiding problems or challenges, but rather about facing them head-on and using one's strengths and resources to overcome them. People who are resilient are able to maintain a positive outlook and a sense of purpose, even in the face of difficult situations. They are able to stay focused on their goals and remain flexible in their approach when faced with obstacles. Resilient individuals are also able to draw on their social support networks and seek help when needed, recognizing that asking for help is a sign of strength, not weakness.
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List and describe the three major theoretical issues in the study of lifespan development.
Explanation:
Three issues pervade this study:
The relative impact of genes and experience on development. Whether the development is best described as gradual and continuous or as a sequence of separate stages. Whether personality traits remain stable or change over the life span.The percentage of crossing over events is used to develop a map of chromosomes. View the chromosome map on the last page. How far apart are the alleles for black body and vestigial wings? (Do the math!) View the proportion of flies from your data that indicate crossover occurred (VG and BL flies) and multiple it by 100. Based on your data, how far apart are these alleles?
Based on the data you provided, the alleles for black body and vestigial wings are estimated to be 1 unit apart on the chromosome map.
To determine the distance between the alleles for black body and vestigial wings on a chromosome map, we need to use the percentage of crossing over events between them. Let's assume you have conducted a genetic experiment and obtained the following data;
Proportion of flies showing crossover (VG and BL flies); X%
The distance between the alleles can be estimated using the formula;
Distance = (Percentage of crossover events / Total progeny) × 100
Let's say the percentage of crossover events between black body (BL) and vestigial wings (VG) alleles is 10%, and you obtained a total of 1,000 progeny from your experiment.
Distance = (10 / 1000) × 100 = 1 unit
Therefore, based on the data you provided, the alleles for black body and vestigial wings are estimated to be 1 unit apart on the chromosome map.
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What are some characteristics of ecotourism in Africa?
Answer:
A few of the ecotourism features are the traditional practices, encouraging interaction between visitors with the local villages to increase sale of handicraft items, the promotion of cultural dance, music as well as hiring local workers to maintain the lodge
Explain why only certain substrate can combine with enzymes.
Help me please
Answer:
sry i cant i too dubm need points tho
Explanation:
Select all the correct answers.
This model shows a human embryo. What can you determine about its development from the model?
It has a postanal tail.
It’s a vertebrate
It has pharyngeal arches.
It has fully developed organ systems.
From the model shown of a human embryo, the following facts about its development can be determined: It’s a vertebrateIt has pharyngeal arches It has a postanal tail.
A vertebrate is any member of the subphylum Vertebrata, which comprises organisms having a backbone or spinal column. Humans, as well as all other mammals, birds, reptiles, fish, and amphibians, are vertebrates.The pharyngeal arches are a collection of ridges in the pharynx that separate the pharynx into separate segments. They are structures in the embryo that go on to form several other structures in the head and neck region, including the jaws, teeth, and certain muscles of the face.
A postanal tail is an extension of the body that extends beyond the anus. It is characteristic of the development of most chordates, which includes both vertebrates and invertebrates. These tails contain muscles and other structures that enable the organism to move about its environment in a coordinated manner.From the model of the human embryo provided, none of the characteristics indicate fully developed organ systems. Hence, the correct options are:a) It’s a vertebrate) It has pharyngeal arches) It has a postanal tail.
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3. Carbon can also be harmful. Describe one major way that carbon is threatening
our way of life on Earth.
HELPPP ME
Carbon can also be harmful because a large amount of carbon is increasing the warmth of the earth. Carbon dioxide gas increases, lowering the pH of the ocean by the process called acidification, which is a threat to Ocean animals.
What is carbon?Carbon is an element or a substance that is present on earth in different forms full stop carbon is present in two forms on the earth, one is black and heart solid and one is gray and soft.
Carbon reacts with another element to produce different compounds, when carbon reacts with oxygen is produced carbon dioxide which is a very harmful gas for the earth and human beings.
Thus, as greenhouse gases are increasing including carbon dioxide the main threat to life and the earth is increasing of temperature which is melting the ocean and high temperature would not be best for all creatures.
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What three structures are responsible for aiding the process of making transporting or storing protein
Answer:
the nucleus, ribosomes, the rough endoplasmic reticulum and the Golgi apparatus
Explanation:
Explain in a paragraph how speed and velocity impact blood splatter
Please no links!
Answer:
The force of the blood hitting a surface for medium velocity blood spatter is between 5 and 100 feet per second. This causes the droplets of blood to be smaller in diameter, and more like a spray. High velocity blood spatter: ... This causes the pattern of the blood to be similar to a fine spray.
Explanation:
when nonhomologous chromosomes exchange parts, a(n) _____ has occurred. mismatch reciprocal translocation inversion base exclusion closed reading frame
When nonhomologous chromosomes exchange parts, a reciprocal translocation has occurred.
What is reciprocal translocation?Reciprocal translocation refers to a chromosomal aberration where two non-homologous chromosomes swap parts, resulting in an exchange of chromosomal materials between the two chromosomes. This type of translocation is seen in a number of genetic diseases and is one of several chromosomal rearrangements that occur.
A reciprocal translocation, for example, can result in two chromosomes breaking, exchanging parts, and rejoining. While neither chromosome has lost or gained any genetic material, each chromosome has a distinct arrangement of genes. A translocation can cause abnormalities in offspring due to the effects of gene duplication or gene loss, as well as the alteration of gene regulation.
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Which of the following could be a function of a phagocyte?
Choose 1 answer:
A. Acting as a physical barrier against pathogens
B. Activating B cells
C. Engulfing a foreign pathogen
D. Making antibodies specific to a pathogen
D. Producir anticuerpos específicos para un patógeno
The following could be a function of a phagocyte, Making antibodies specific to a pathogen.
What is chemotaxis?
The process of attracting the phagocytes to the site of injury is known as chemotaxis.
The chemotaxis is a part of the inflammatory response of the body. The phagocytes once attracted to the site of the injury ingests the bacteria by attaching to the bacterial cell wall.
The ingestion of the invading bacteria is known as phagocytosis. The destroyed bacteria is then released from the phagocytes.
Thus, option D is correct, Making antibodies specific to a pathogen.
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200g of water at 90degree Celsius is mixed with 100g of water at 30 degree Celsius. What is the final temperature (C of water =4.2jkg-1 k-1
Answer:
70 °C
Explanation:
Since heat lost by 200 g of water = heat gained by 100 g of water
-mc(T - T') = m'c(T - T")
where m = 200 g,T' = 90°C, m' = 100 g,T" = 30°C and T = final temperature of mixture, c = specific heat capacity of water = 4.2jkg-1 k-1.
Substituting the values of the variables into the equation, we have
-mc(T - T') = m'c(T - T")
-200 g(T - 90 °C) = 100 g(T - 30 °C)
(T - 90 °C) = 100 g(T - 30 °C)/-200 g
(T - 90 °C) = -0.5(T - 30 °C)
T - 90 °C = -0.5T + 15 °C
collecting like terms, we have
T + 0.5T = 90 °C + 15 °C
1.5T = 105 °C
T = 105 °C/1,5
T = 70 °C
You leave a cracker in your mouth for 7 minutes without chewing. Hormones signal amylase to be released in your mouth and the cracker begins to dissolve. Which to systems ane being used in this scenario?
A.Endocrine & Immune
B.Digestive and Skeletal
C.Endocrine & Digestive
D.Digestive and Excretory
10
What type of boundary has plates that slide past each other?
A) convergent
B
transform
C divergent
D
tension
Answer:
B
Explanation:
Transform. It like slides past eachother and transforms
What are two different ways that
weathering can happen?
Chemically & Physically(mechanically)
erosion & physically (mechanically)
chemically & deposition
Answer:
Chemically & Physically(mechanically)
Explanation:
Weathering is the wearing away of rock found at the surface of the earth. There are different ways weathering can occur and they include;
1. Mechanical weathering: This is the breakdown of rock into bits or fragments. Physical factors such as water can lead to this breakdown. When water falls into the pores and cracks of rocks, pressure can be created that will eventually result in the breakdown of these rocks.
2. Chemical weathering: This type of weathering causes a change in the physical makeup of the rock. The new form of rock created is more prone to erosion. Temperature is factor that can speed up chemical weathering.
I need help ASAP pleaseeee
Answer:
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