T cells are a part of the immune system that focuses on specific foreign particles. Rather than generically attack any antigens, T cells circulate until they encounter their specific antigen. As such, T cells play a critical part in immunity to foreign substances.
Explain why the northern hemisphere receives more solar energy from the sun between june and august than the southern hemisphere receives between june and august.
Answer:
Whichever hemisphere (the Northern or Southern Hemisphere) is tilted toward the sun receives more direct rays of sunlight (or rays that are closer to perpendicular or a 90° angle). The hemisphere tilted toward the sun also has more hours of daylight than the hemisphere that is tilted away from the sun
Explanation:
I need your guys's help!
I had a science exam a day or two ago, and this was one of the questions:
Identify and name the cell organelle:
M- It allows transportation of materials in and out of plant cell.
Isn't the correct answer supposed to be cell membrane? Even though they mentioned in a plant cell.. Because the cell wall is completely permeable.. so it lets anything pass through.. but the cell membrane decides and allows materials to enter and exit the cell..
The teacher said the correct answer is cell wall though.. I would like to know your thoughts!
The correct answer is the cell membrane because it is the second last semi-permeable layer of the cell.
What is the function of cell membrane?The cell membrane is a semi-permeable barrier that is responsible for allowing molecules across the cell when it is needed by the cell.
So we can conclude that The correct answer is the cell membrane because it is the second last semi-permeable layer of the cell.
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The cell membrane allows the transportation of materials in and out of plant cells, although the cell wall is also key for these processes.
What is the cell wall?The cell wall is a rigid structure located outside the plant cell that protect it against friction and osmotic stress.
The cell wall is also required to transport substances in and out of the plant cell by pores present in this structure.
Moreover, the cell membrane is a physical barrier that allows the interchange of nutrients and waste materials between the cell and its surrounding environment.
In conclusion, the cell membrane allows the transportation of materials in and out of plant cells, although the cell wall is also key for these processes.
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Why is the circulatory system connected to the digestive system in the body? Explain
Answer:
(1) Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go. (2) Filters out waste from food and pushes it through intestines and out the body
Explanation:
hope it helps you
Answer:
Digestive System gets nutrients (good) from food and hands it over to the blood and Circulatory System then carries those nutrients where they need to go. Filters out waste from food and pushes it through intestines and out the body (and you know how and where it gets out).
what type of carbohyydrates does milk contain? egenuity?
Explanation:
Lactose, or milk sugar, is the main carbohydrate found in milk. It's broken down into its subunits — glucose and galactose — in your digestive system.
Which of the following would NOT be an adverse effect of the human population?
decline in aquatic life in certain rivers
damages to soil and water sources
technological advancements
loss of forests for land development
The 3rd one: Technology advancements
What are the benefits of planting only native species when implementing rain gardens, no-mow native meadows, and/or tree plantings?
All options above are potential benefits of planting only native species when implementing rain gardens, no-mow native meadows, and/or tree plantings.
What are native species?Native species are species that evolved in a particular environment and therefore they are well adapted to it.
Native plants are well know to be more adapted to survival and do not need extra watering to survive.
In conclusion, all options above are potential benefits of planting only native species when implementing rain gardens, no-mow native meadows, and/or tree plantings.
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Unlike natural selection, genetic drift is based solely on which of the following?
O Migration
O Chance
O Mutations
O Genotype of the individual
Answer:
Chance
Explanation:
Genetic drift is the sudden disappearance of different genetic traits within a population. Genetic drift occurs most commonly due to accidents or chance scenarios.
A group of students is measuring the number of paper bags that are brought to a recycling center in a single day.
What are the students doing?
A. Analyzing
B. Collecting data
C. Stating a problem
D. Making a conclusion
Can you help me please
Answer:
How can we help you in math or another subject?
How is meiosis different from mitosis.
Answer:
the answer is b
Explanation:
at the end of meiosis, each gamite has two full sets of chromosones
Atoms were named "atomos" by the Ancient Greeks. What does "atomos" mean?
Clear
Solid
Indivisible
Small
Answer:
its the ancient greek term for "the ulimate particles of matter" sorry if im wrong
Explanation:
Answer:
Indivisible
Explanation:
Well it means uncuttable which is a synonym to indivisible
a trophic pyramid for southern lake michigan coastal
please answer it
Answer:
Topic Pyramid-
Explanation:
the basic structure of interaction in all biological communities characterized by the manner in which food energy is passed from one trophic level to the next along the food chain.
:Hope's It's Help:
A region that includes tigers, eagles, lizards, fish, rabbits, and many other types of organisms would be described as having a high level of a genetic diversity. b taxonomic diversity. c species diversity. d ecosystem diversity.
A region that includes tigers, eagles, lizards, fish, rabbits, and many other types of organisms would be described as having a high level of species diversity, i.e., option c.
What is species diversity?Species diversity is referred to as the number of different species present in an ecosystem and their relative abundance.
When all of the species present are equally abundant in the area, diversity is greatest.
A region that includes tigers, eagles, lizards, fish, rabbits, and many other types of organisms would be described as having a high level of species diversity
Thus, the correct option is c.
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A _____ cell is one that has two copies of each chromosome.
a haploid
b monoploid
c somatic
d diploid
A diploid cell is one that has two copies of each chromosome and is denoted as option D.
What is a Diploid cell?This type of cell has two copies of each chromosome which is usually from the mother and father.
Haploid cells on the other hand have only one set of chromosome thereby making it the most appropriate choice.
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8. A cladogram is shown below.
a) What is the outgroup of this cladogram? (2 points)
b) Name all of the traits that the mackerel has, based on this cladogram. (3 points)
c) Which trait evolved first, lungs or hair? Explain how you know. (3 pojnts)
Here the outgroup is a protozoa, and all of the traits that the mackerel has are a jaw, a segmented body, and a multicellular body. Lungs evolved first as frog has lungs and then hair evolved.
What is a cladogram?A cladogram is a diagram used in cladistics, which is a method of analyzing biological relationships based on shared, derived traits. It is a branching diagram that shows the evolutionary relationships among a group of organisms based on similarities and differences in their physical or genetic characteristics. The organisms are grouped into clades, which are defined by shared derived characteristics, or synapomorphies. Synapomorphies are traits that have evolved from a common ancestor and are present in all of its descendants.
Hence, the outgroup is a protozoa, and all of the traits that the mackerel has are a jaw, a segmented body, and a multicellular body. Lungs evolved first as frog has lungs and then hair evolved.
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Evidencia de los colonos de Washington
A student carried out an experiment to model the digestion of starch by the enzyme amylase in the small intestine.
Visking tubing is a selectively permeable membrane that has small holes in it to allow small molecules to pass through. At regular intervals, the student tested the liquid inside and outside the Visking tube.
How could the student test for the presence of starch inside the Visking tubing?
Answer:
Put one drop on the dimple tile, and the rest in a test tube. Then put the teat pipette back in the water outside the Visking tubing. Test the drops of liquid in the dimple tile by adding one drop of iodine solution from the dropper bottle. If they turn blue-black, the liquid contains starch.
Explanation: i hope this helped :)
3. Identify the independent variable: A scientist wanted to see if temperature affected the male/female ratio in alligator eggs. She took 5 clutches of eggs and placed them in different incubators. Each incubator had a temperature 5 degrees different from the other. Each had a humidity of 87% and received 16 hours of simulated sunlight.
A. 16 hours of sunlight
B. Temperatures
C. 87% humidity
Answer:
answer is a
Explanation:
hope this helps
some chains of carbon atoms bend when the carbon atoms:
A. form single covalent bonds.
B. form double covalent bonds.
C. form bonds with oxygen atoms.
D. form bonds with hydrogen atoms.
Answer:
Fats with at least one double bond between carbon atoms are unsaturated fats. When some of these bonds are in the cis configuration, the resulting bend in the carbon backbone of the chain means that triglyceride molecules cannot pack tightly, so they remain liquid (oil) at room temperature.
Bacteria that are resistant to more than one antibiotic are called superbugs. Compare the control and antibiotic data from the three farms and select all the true statements
After comparing the correct statements are another superbug was created by using the same method of giving antibiotics to chickens as Monita Farms and the data for the control farm shows that not administering antibiotics helps to prevent superbug creation.
What are superbugs?Antibiotics are the drugs that are used to kill bacteria, but some develop resistance against it called superbugs.
According to the given scenario, another superbug was created by using the same method of giving antibiotics to chickens as Monita Farms.
Also the data for the control farm shows that not administering antibiotics helps to prevent superbug creation.
Thus, these were the two correct statements.
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what type of frog is this?
Answer:
This species is known for its bright coloration, namely its vibrant green body with blue and yellow stripes on the side. It has a white underside, brightly red and orange colored feet, and is named after its distinctive bright red eyes.
...
Agalychnis callidryas. is its name!
The division of genetic material in a eukaryotic cell is called: replication. mitosis. cytokinesis. binary fission.
Which energy source contributes least to global warming?
A. Coal
B. Oil
C. Geothermal
D. Natural gas
Answer:
C. Geothermal
I Hope im correct ^^
Answer:
C. Geothermal
Explanation:
It's a renewable energy unlike the rest of the options.
What elements are always present in protein?
A. radium, boron, fluorine, and chlorine
B. mercury, iron, lead, and aluminum
C. carbon, hydrogen, oxygen, and nitrogen
D. neon, argon, krypton, and copper
ہے
What elements are always present in protein?
A. radium, boron, fluorine, and chlorine
B. mercury, iron, lead, and aluminum
C. carbon, hydrogen, oxygen, and nitrogen ( ✔ )
D. neon, argon, krypton, and copper
Explanation :Proteins are one of the primary constituents of living matter. They consist of long chains of amino acids, which are bonded together by peptide linkages and thus called polypeptides. There are about 20 amino acids, and the atoms most prevalent in these are carbon, hydrogen, oxygen, nitrogen, and sulphur.
The elements that are always present in protein is carbon, hydrogen, oxygen, and nitrogen. The correct option is C.
Proteins are large molecules made of amino acids that are crucial for a number of biological processes in living things. Proteins usually contain the following elements: carbon (C), hydrogen (H), oxygen (O), and nitrogen (N).
These components serve as the fundamental building blocks of amino acids, which are joined by peptide bonds to form protein chains.
The fundamental components that are consistently present in all proteins are carbon, hydrogen, oxygen, and nitrogen, while other elements, such as sulphur (S) and phosphorus (P), can also be found in some proteins.
Thus, the correct option is C.
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Which description best identifies the unique attributes of connective tissue?.
Full question:
Which description best identifies the unique attributes of connective tissue?.
A. Connective tissues, unlike other tissues, lack blood vessels and blood.
B. Connective tissues transmit signals from one part of the body to another.
C. Connective tissue is characterized by an extracellular matrix.
D. Connective tissues are hard and inflexible, whereas soft, flexible structures of the body are made up of other tissue types.
Solution:
Connective tissue is characterized by an extracellular matrix. Thus, the correct option is C.
An extracellular matrix distinguishes connective tissue. A histologist analyzes a tissue slide and notices a densely packed parallel network of fibers. Squeezed between the fibers, a few cells can be observed.
What is connective tissue?Connective tissues are those tissue which help in support, protection, and structure. Additionally, connective tissue stores fat, aids in the movement of nutrients and other substances between tissues and organs, and aids in the repair of damaged tissue. Cells, fibers, and a gel-like material make up connective tissue.
Extracellular macromolecules and minerals, includes as collagen, enzymes, glycoproteins, and hydroxyapatite, make up the extracellular matrix (ECM), a three-dimensional network that provides structural and biochemical support to surrounding cells.
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The layer of the uterine wall that is shed during menstruation is the:.
Answer:
The layer of the uterine wall that is shed during menstruation is the endometrium
An abdominal hernia results when weakened muscles allow the protrusion of abdominal structures. In one type of abdominal hernia, parts of a serous membrane and the small intestine form the bulge. Which serous membrane is involved?.
Answer: The peritoneum
Explanation: It is the membrane that lines the abdominal cavity and (completely or partly) encloses most of the organs in the abdomen. The protruding pouch, called the hernia or hernial sac, may contain parts of organs such as the bowel or stomach.
An abdominal hernia is the intestinal protrusion and tissues from the abdominal gap. The peritoneum serous membrane is involved in the bulging of the tissue from the small intestine.
What is an abdominal hernia?The abdominal hernia has been the extension of the tissues and part of the intestine from the gaps of the wall that may be caused due to injury, surgeries, pressure on muscles, irregular bowel movement, heavy exercises, excessive vomiting, etc.
The peritoneum is a serous membrane of the abdomen region involved with the covering of the internal abdominal organs. It supports the internal structures and can be protruded as a hernia from the weakened walls and muscles of the abdomen region near the belly.
Therefore, the peritoneum is the serous membrane involved in an abdominal hernia.
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A(n) ________ is a hard outside covering that is used for protection and prevents the inner body area from drying out.
exoskeleton
endoskeleton
cuticle
cilia
The cuticle is the most exterior layer of arthropods' tegument, and its principal function is to protect the body and avoid dehydration. Option C is correct. Cuticle.
What is the cuticle?
The cuticle is the most exterior layer of arthropods' tegument. It is secreted by the epidermis and develops right over it.
It is composed of two main layers,
epicuticle ⇒ outermost layerprocuticle ⇒ inner layer
The cuticle is mainly made of chitin, and its function is to protect the organism's body and avoid dehydration.
Because it avoids dehydration it is believed that arthropods had such an evolutive and adaptative successful in their transition from water to the land.
The cuticle also provides support to the body and a muscle attachment surface.
The correct option is C. Cuticle
A _Cuticle_ is a hard outside covering that is used for protection and prevents the inner body area from drying out.
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A population of mice lives on an island in the Pacific Ocean. From year to year, the size of the adult population remains at about 300 individuals, and the variety and frequency of the traits of the mice change very little.
Which of these events would be MOST likely to cause an evolutionary change to the mouse population on the island?
O A. an island predator killing and eating 50 mice.
O B. a storm that drowned about 50 mice all across the island.
O C. a mutation in the skin cells of an adult mouse.
O D. a drought that reduced and altered the food supply of the mice.
O E. a breeding pair of mice producing an unusually large number of offspring.
Answer:
cbd
Explanation:
C, a mutation in the skin cells of an adult mouse, is the occurrence that would be most likely to lead to an evolutionary shift in the mouse population on the island.
What is the genetic variety ?Genetic variety, which is the foundation of evolution, is mostly produced via mutations. Mutations can result from external sources like radiation or chemicals or spontaneously arise as DNA is replicated during cell division.
A change in a mouse's genes resulting from a mutation in its mature skin cells might be passed on to the mouse's progeny. The other things on the list wouldn't affect the population of mice in an evolutionary way. Event A, a predator on an island killing and devouring 50 mice, would cause the population to decline.but would not result in an evolutionary shift due to size.
Even though Event B, a storm that drowned roughly 50 mice over the whole island, reduced the population number, it had no evolutionary impact. Even though Event D, a drought that reduced and altered the mice's food supply, did not affect evolution, it may have changed the mice's behaviour, such as making them more competitive for food.
The population would grow as a result of Event E, a mating couple of mice having an abnormally high number of offspring, but no evolutionary change would result.
In conclusion, C, a mutation in an adult mouse's skin cells, is the scenario that would most likely result in an evolution of the mouse population on the island.mouse. The main cause of the genetic variety that underlies evolution, mutations can alter the genes that are handed down to the next generation. The other things on the list wouldn't affect evolution.
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Hemlock trees support life of other organisms. Climate change has increased the rate of infection of Hemlocks with woolly adelgid. These kill the trees which decrease the habitat of animals and other insects. This is an example of how climate change impacts the
Answer:
Don't know your answer choices, though if one of them is "Community Level" that is the correct one.
Explanation:
Found on other websites, and just completed a quiz with the same answer.