define the functions of endocrine glands
Answer:
Endocrine glands release hormones into the bloodstream. This lets the hormones travel to cells in other parts of the body. The endocrine hormones help control mood, growth and development, the way our organs work, metabolism , and reproduction.
Explanation:
In 3-5 sentences explain which type of reproduction is more beneficial, asexual or sexual.
what is the primary function of cellular respiration?
What biomolecule is a cell with a lot of ribosomes attached to its rough endoplasmic reticulum probably specialized to manufacture?
Answer:Ribosomes are the cellular structures responsible for protein synthesis. When viewed through an electron microscope, ribosomes appear either as clusters (polyribosomes) or single, tiny dots that float freely in the cytoplasm. They may be attached to the cytoplasmic side of the plasma membrane or the cytoplasmic side of the endoplasmic reticulum and the outer membrane of the nuclear envelope. Electron microscopy has shown us that ribosomes, which are large complexes of protein and RNA, consist of two subunits, aptly called large and small (Figure 1). Ribosomes receive their “orders” for protein synthesis from the nucleus where the DNA is transcribed into messenger RNA (mRNA). The mRNA travels to the ribosomes, which translate the code provided by the sequence of the nitrogenous bases in the mRNA into a specific order of amino acids in a protein. Amino acids are the building blocks of proteins.
Because proteins synthesis is an essential function of all cells, ribosomes are found in practically every cell. Ribosomes are particularly abundant in cells that synthesize large amounts of protein. For example, the pancreas is responsible for creating several digestive enzymes and the cells that produce these enzymes contain many ribosomes. Thus, we see another example of form following function.
Mitochondria
Mitochondria (singular = mitochondrion) are often called the “powerhouses” or “energy factories” of a cell because they are responsible for making adenosine triphosphate (ATP), the cell’s main energy-carrying molecule. ATP represents the short-term stored energy of the cell. Cellular respiration is the process of making ATP using the chemical energy found in glucose and other nutrients. In mitochondria, this process uses oxygen and produces carbon dioxide as a waste product. In fact, the carbon dioxide that you exhale with every breath comes from the cellular reactions that produce carbon dioxide as a byproduct.
In keeping with our theme of form following function, it is important to point out that muscle cells have a very high concentration of mitochondria that produce ATP. Your muscle cells need a lot of energy to keep your body moving. When your cells don’t get enough oxygen, they do not make a lot of ATP. Instead, the small amount of ATP they make in the absence of oxygen is accompanied by the production of lactic acid.
This transmission electron micrograph of a mitochondrion shows an oval outer membrane and an inner membrane with many folds called cristae. Inside the inner membrane is a space called the mitochondrial matrix.
Figure 2. This electron micrograph shows a mitochondrion as viewed with a transmission electron microscope. This organelle has an outer membrane and an inner membrane. The inner membrane contains folds, called cristae, which increase its surface area. The space between the two membranes is called the intermembrane space, and the space inside the inner membrane is called the mitochondrial matrix. ATP synthesis takes place on the inner membrane. (credit: modification of work by Matthew Britton; scale-bar data from Matt Russell)
Mitochondria are oval-shaped, double membrane organelles (Figure 2) that have their own DNA and ribosomes (we’ll talk about these later!). Each membrane is a phospholipid bilayer embedded with proteins. The inner layer has folds called cristae. The area surrounded by the folds is called the mitochondrial matrix. The cristae and the matrix have different roles in cellular respiration.
Peroxisomes
Peroxisomes are small, round organelles enclosed by single membranes. They carry out oxidation reactions that break down fatty acids and amino acids. They also detoxify many poisons that may enter the body. Many of these oxidation reactions release hydrogen peroxide, H2O2, which would be damaging to cells; however, when these reactions are confined to peroxisomes, enzymes safely break down the H2O2 into oxygen and water. For example, alcohol is detoxified by peroxisomes in liver cells. Glyoxysomes, which are specialized peroxisomes in plants, are responsible for converting stored fats into sugars.
Explanation:
when two strains of bacteria with genotypes abcd and abcd are grown together in the lab, a small number of bacteria with the genotype abcd eventually arise. how does this likely occur?
Answer:
These enzymes work in two ways. Some are pre-replicative and search the DNA for nucleotides with unusual structures
Explanation:
This happened through a lateral transfer of genes.
We can arrive at this answer because:
Lateral gene transfer is a system for exchanging genetic material between unrelated bacteria.Bacteria are beings that reproduce without the exchange of genetic material, but in some cases, this can be done with the lateral transmission of genes.This transmission can be done through the process of conjugation, translation, or transformation.The result is that new bacteria are created with a mixture of genes from two unrelated bacteria.
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(a) Identify the most likely mode of transport across the membrane for substance L. Explain how information provided helps determine the most likely mode of transport.
Active transport occurs against the electrochemical gradient. It needs energy to move molecules from the lower concentration side to the higher concentration side. The mode of transport is active transport.
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There are three main different types of transport across the membrane
Simple diffusion ⇒ Does not need energy to occurFacilitated transport ⇒ Does not need energy to occurActive transport ⇒ Needs energy to occurActive transport is the transport of molecules that move against the electrochemical gradient, so it does need energy to happen.
Molecules move from the lower concentration side to the higher concentration side of the membrane.
Carrier proteins are in charge of active transport. The needed energy might proceed from the ATP molecules or the membrane's electric potential.
In the exposed example, a scientist wants to determine how substance L enters a cells in a culture.
The cells maintain a 120 mM intracellular concentration of substance L. Varying external concentrations of substance L (10 to 100 mM) in culture medium (Table 1).Table 1. Rate of entry of substance L into mammalian cells in culture
External concentration of substance(mM) Rate of entry of substance L
10 5%
20 25%
30 45%
40 65%
50 80%
60 90%
70 95%
80 100%
90 100%
100 100%
Now, we need to identify the most likely mode of transport across the membrane for substance L, and explain how information provided helps determine the most likely mode of transport.
We know that the intracellular concentration is 120mM.
As we can see, this concentration exceeds all of the culture media concentrations. Yet, the substance keep moving into the cell.
As the concentration inside the cell is always higher than the concentration outside, we can assume that this is not passive transport because the molecule transport is going against its concentration gradient.
Hence, the remaining option is active transport. And as said before, we can see it because the substance keeps crossing the membrane toward the cell interior despite its concentration being higher in the interior of the cell than in the exterior.
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Which of the following best represents the goals of the 1963 March on Washington organizers?
A.) To tell Congress they are doing great.
B.) To unify Americans to gather in non-violent protest to bring about real, actionable change
C.) To get the president on their side
D.) To support separate education
Answer:
D.) To support separate education
Explanation:
Answer:
B
To unify Americans to gather in non-violent protest to bring about real, actionable change
Explanation:
Originally conceived as a mass demonstration to spotlight economic inequalities and press for a new federal jobs program and a higher minimum wage, the goals of the march expanded to include calls for congressional passage of the Civil Rights Act, full integration of public schools, and enactment of a bill prohibiting ...
_________ is required for energy given to proteins in the phospholipid layer.
Answer:
Trans-membrane proteins.
Explanation:
Membrane proteins are proteins that are found in the cell membranes of living organisms.
Hope this helped!
9. What keeps the tendons around the wrist from popping out?
Answer:
Soft tissue or subsheath keeps the tendon in place at the wrist. A sudden forced rotation or hyperextension can cause this subsheath to tear and allow the ecu to move out of its natural groove.
Explanation:
what is the most durable part of the human body?
Answer:
the most durable and tough substance in your body is actually a tissue. Encasing your teeth and helping you chew, bite, and tear your food is your tooth enamel. That's the hardest substance in the human body.
Explanation:
The most durable part of the human body is Tooth Enamel.
What is Tooth Enamel?Tooth enamel is defined as the thin outer covering of the tooth that covers the crown of the tooth. This is the part that we can see outside the gums. This is the outer layer, the enamel is transparent. Dentin is the hard tissue that lies beneath the enamel, and is what gives teeth their color.
Once tooth enamel is damaged, it cannot be restored. Enamel can be restored to some extent by improving its mineral content. Enamel is the durable part of the human body.
While toothpaste and mouthwash can never "rebuild" teeth, they can contribute to this remineralization process.
Thus, the most durable part of the human body is Tooth Enamel.
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human construction of buildings and pavement affect the hydrological cycle by
One of the most common plants in Atlantic salt marshes is cordgrass. periwinkle snails cling to the top of tall cord grass is during high tide. The tall cord grass is provide protection from the snails predators such as blue crab. well the snails do not be directly on cordgrass the snails can damage the cord grass when they grays and algae and fungi that grow on the grasses. if the snail populations grow too large they can decrease cord grass growth.
Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails. Hence option B is correct.
Biotic factors - The living components or the living things that are present in the ecosystem that shapes the environment are known as biotic factors. Examples are plants, bacteria, algae, birds, fishes etc.
A ecosystem runs through the interaction of biotic and abiotic component. Biotic supplements acts as a fuel that supports the bacterial growth.
Periwinkle snails graze on the top of the cordgrasses to escape from their predators blue crab. They graze on the fungi and algae that is inhabitant on top of the grass, they do not feed directly on the cordgrass
While grazing they actually damage the cordgrass by spreading the fungal infection.
Hence, option B is Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails is correct.
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The correct question is :
One of the most common plants in Atlantic salt marshes is cordgrass. Periwinkle snails cling to the top of tall cordgrasses during high tide. The tall cordgrasses provide protection from the snails’ predators, such as the blue crab. While the snails do not feed directly on the cordgrass, the snails can damage the cordgrass when they graze on algae and fungi that grow on the grasses. If the snail population grows too large, it can decrease cordgrass growth.
Question
Based on the passage, which of the following describes the ecological role that cordgrass serves for the snails?
Responses
A. Cordgrass is a biotic factor for the snails because it is the snails’ main food source.
B. Cordgrass is a biotic factor for the snails because it is a living source of protection in the Atlantic salt marshes for the snails.
C. Cordgrass is an abiotic factor for the snails because it provides habitat for the snails and crabs.
D. Cordgrass is an abiotic factor for the snails because it produces algae and fungi for the snails.
Match the description with the correct term
Air pollution in US National Parks is effecting the environment in what way(s)?
a.
plant damage from ozone exposure
b.
high levels of mercury found in endangered bat species
c.
changes to alpine ecosystems due to nitrogen
d.
all of the above
Answer:
D
Explanation:
Help please with this assignment
Answer: This answer is for all the questions: Chargaff's rules state that DNA from any species of any organism should have a 1:1 stoichiometric ratio of purine and pyrimidine bases (i.e., A+G=T+C) and, more specifically, that the amount of guanine should be equal to cytosine and the amount of adenine should be equal to thymine.
Explanation:
which is a part of the
The aurora borealis is caused by the
thermosphere.
help me papis
Answer:
The answer to this question is IONOSPHERE
Explanation:
hope it helps ..
have a great day
How do woodland forests and grasslands differ? Multiple choice question. A) Grasslands have few trees. B) Grasslands have warm weather. C) Grasslands have no birds.
Answer:
A grasslands have few trees
Explanation:
help please!! will mark brainliest
Answer is the first option Place a metal paper clip on a table and slowly bring each electromagnet closer to the paper clip to see which can attract the paper clip from a greater distance.
I don't know why but I find your questions a bit too easy..
Which term names the types of elements usually found in meteorites?
Answer: minerals—pyroxenes, olivines, and feldspars—dominate the stony meteorites. Metals—kamacite and taenite—along with small amounts of schreibersite and cohenite dominate iron meteorites. The following list is a short guide to selected minerals found in meteorites.
Explanation:
Answer:
metals
Explanation:
i took the test
List 4 examples of limiting factors described in the reading and label each if it would be considered an abiotic or biotic limiting factor.
Answer:
Explanation:food, water, habitat, and mate.
Limiting factors can be either abiotic or biotic. Examples: Abiotic → water, pH, radiation, salinity. Biotic → predation, competition, parasitism.
What are biotic and abiotic factors?The ecosystem is composed of living and non-living elements that interact and depend on each other. These are the biotic and abiotic factors.
• Abiotic factors are physical and chemical components of the ecosystem. These are the non-living elements.
• Biotic factors are all the living components in the ecosystem.
Biotic and abiotic factors influence the survival and reproduction of living beings.
What are the limiting factors?Limiting factors are environmental conditions that act directly on populations and individuals, limiting their distribution and growth.
These factors might be either biotic or abiotic and affect natality and mortality rate, migration, etcetera.
Limiting factors might be a result of the population density or might be dense-independent.
When talking about dense-independent limiting factors we are referring to
abiotic factors, such as temperature, pH, salinity, humidity, radiation, etcetera.natural disasters like fires, volcanic eruptions, flooding, etceterahuman impactWhen talking about dense-dependent limiting factors we are referring to biotic factors and the interactions established between species that control other species' growth.
These are, for instance,
competition, parasitism, and predation
Each species carries out a different role in these interactions.
These relationships and the results are what determine the destiny of the populations and their size.
Now, since I do not have the text, I will suggest a few examples of limiting factors. Take a look at them and then look for some other examples in your reading.
Limiting biotic factors:
predatorcompetitorparasitesLimiting abiotic factors:
waterpHradiationsalinityFollowing this framework, you should look in your reading which limiting factors are described.
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Which statement describes the energy in a food web? Select three options.
Answer:single path the last one I think cuz it can only move up
Explanation:
Answer:
Ig , second, third, and fourth,
Explanation:
hope u got it correct
Diabetes is a disease where the body is unable to produce enough insulin in the pancreas to help lower the levels of blood glucose. The ribosomes manufacturer the insulin in healthy cells, but those who are diabetic do not have healthy cells to do this. In which organ would you find the ribosomes producing insulin in a non diabetic individual?
A.) liver
B.) pancreas
C.) stomach
D.) thyroid
insulin is produced in the pancreas
The pancreas is the organ in which ribosomes produce insulin in a non-diabetic individual. So, the correct option is B.
What do you mean by Diabetes?Diabetes may be defined as a disease that increases the blood glucose level as compared to normal. This is due to the body being unable to produce enough insulin in the pancreas to help lower the levels of blood glucose.
Insulin is produced in the pancreas with the help of ribosomes in non-diabetic individuals.
Therefore, the organ in which ribosomes produce insulin in a non-diabetic individual is the pancreas.
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The phospholipid by layer is What
Phospholipids are made up of two layers, the outer and inner layers. The inside layer is made of hydrophobic fatty acid tails, while the outer layer is made up of hydrophilic polar heads that are pointed toward the water.
Which of the following is not true during crossing over?
Use each vocabulary term in a sentence.
13. controlled study
14. environmental ethics
Answer:
Controlled study:
We conducted a controlled study on the two plants.
Environmental ethics:
The man over there is all business he talks of social and environmental ethics.
Explanation:
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What is the source from where organisms get glucose?
This is apart of cellular respiration
Answer:
The source of glucose molecules in plants is the product formed by the process of photosynthesis which is ultimately stored in the parts of plants. In animals, glucose is formed by the oxidation of carbohydrates which are obtained from food.
Explanation:
In the process of photosynthesis, plants and other photosynthetic producers create glucose, which stores energy in its chemical bonds. Then, both plants and consumers, such as animals, undergo a series of metabolic pathways—collectively called cellular respiration.
Does hermatite occur naturally
Answer:
I would say yes.
Explanation:
Hematite is found as a primary mineral and as an alteration product in igneous, metamorphic, and sedimentary rocks. It can also form during contact metamorphism when hot magmas react with adjacent rocks. The most important hematite deposits formed in sedimentary environments.
I hope I'm correct
Answer:
Hematite is found as a primary mineral. it is naturally formed in sedimentary environments.
Gypsum is a naturally occurring stone, a metallic salt of calcium. It commonly forms as an evaporite from the dissolution of limestone by exposure to sulphuric acid from volcanic activity
So the answer is YES
a particularly active cell might contain large numbers of
Me and my brother are confused on an question “ Circle the organism(s) that are out of place in this food chain” he believes thats he right (the first one) while i don’t think so(the last one), who is right??
Answer:
Beaver
Explanation:
LOTS of animals eat beavers like A LOT and i would think that something would eat it before the wolf
Answer:
Beaver is out of place in the food chain
because-
Beaver is an animal and is a heterotroph and cannot use sunlight to make it's food but while plants can.
correct order would be-
sunlight - cattails - beaver - wolf
what are the three pairs of funiculi in the spinal cord?
Answer:
In each half of the spinal cord, white matter is divided into three major bundles, called funiculi. The dorsolateral sulcus marks the division between dorsal funiculus and lateral funiculus.
Explanation: