Answer:
Antigen-presenting cells show digested antigens to T cells through the MHC on their surface, which allows the T cell to “see” the antigen and recognize it as foreign. The connection between the MHC and the receptor on the T cell is the first signal necessary to activate the T cell to respond to a tumor and destroy it.
Explanation:
Which of the following is NOT a quality of a good index fossil?
1. They are only found in one location on the earth
2. They are easy to recognize and look different than other fossils
3. They have a limited time period that they were located on the earth
4. They can be used to help date layers of rocks around the world
Answer:
1.
Explanation:
That is not true! Fossils are found in from germany to australia (all around the world)!
The study of fossils is called paleontology. On earth, there are different types of fossils present on the earth. For example Body Fossils, Molecular Fossils, Trace Fossils, Carbon Fossils, Pseudofossils.
The correct answer is option A.
What are fossils?A fossil is any preserved remains, impression, or trace of any once-living thing from a past geological age. Examples include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood, oil, coal, and DNA remnantsAccording to the question, all the options are relatable to the good fossils index except option A.
The fossils can be found anywhere on the earth, not at a specific location.
Hence the correct answer is option A that is They are only found in one location on the earth.
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While playing tennis you need to know where your limbs are located so you can move them into the right positions to run or swing your racket. Which of the following senses provides this information?
Answer:
The correct would be - Kinesthesis.
Explanation:
Kinesthesis is the study of the body movement and learning where is your body parts and so can you can move or find the required changes to make to the body and its part. It does not depend on the senses like hearing, vision, or others.
Kinesthesis involved the sensory receptors present in joints, muscles or other body parts involves in making movements and allows to make and understand physical activities. For example, sensing pr knowing where is the body limbs to move to hit or swing the racket or run.
10. In the figure of the U-tube below, side "A" is pure water and side "B" is a 10% starch solution. The starch can not pass
through the membrane because it is too large, only the water moves across the membrane. Explain what has
happened in the before and after picture below. Why does this happen?
Answer:
All of the water has moved through the membrane moving the solution on the other side higher.
Explanation:
I really hope this is right and i helped you out!
Starch cannot pass through membrane because it is too large molecules. Cell membrane is a semipermeable membrane. It cannot allow bigger molecules to pass. It helps only to pass small molecules.
What is cell membrane?A cell membrane, often referred to as a plasma membrane, is present in every cell and serves as a barrier between the interior of the cell and the outside world.
The cell membrane is a lipid bilayer that is semipermeable. The cell membrane regulates the flow of substances into and out of the cell.
The cell membrane, commonly referred to as the plasma membrane, serves as the body of a cell. It also keeps the environment inside the cell constant, and that membrane has many functions.
Therefore, Starch cannot pass through membrane because it is too large molecules. Cell membrane is a semipermeable membrane. It cannot allow bigger molecules to pass. It helps only to pass small molecules.
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Identify one condition that might cause snowy animals to leave their usual habitat and
move to another area.
Answer:
A Change in climate.
Explanation:
"Snowy" or better yet Arctic animals survive better in colder climates, So if their home gets warmer they will move towards colder weather. But if you want another example they will also leave if there is little to no food.
How are photosynthesis and respiration similar?
Answer:
Photosynthesis makes the glucose that is used in cellular respiration to make ATP. The glucose is then turned back into carbon dioxide, which is used in photosynthesis. While water is broken down to form oxygen during photosynthesis, in cellular respiration oxygen is combined with hydrogen to form water
Explanation:
Hope it helps:)
I really need help on this.
1. If you travel for three hours at a speed of 30 km/h, how far will you go?
2. Liz is driving to Beaumont, which is 175 miles east from her current position. She plans on being in Beaumont in 2 hours. If she makes it what will her average velocity have been?
3. How much time will it take for a bug to travel 5 meters across the floor if it is traveling at 1 m/s?
Answer:
245 miles
Explanation:
I have no explanation.
there are five different types of nucleotide bases found in living things. Which is an accurate comparison of the bases found in birds and the bases foubd in flowers?
Answer:
Uracil
Thymine
Guanine
Adenine
Cytosine
birds and flowers have different Arrangements of the bases
Explanation:
hope this helps :]
Answer:
A. Birds and flowers have different arrangements of the bases.
Explanation:
In words please describe what happens during photosynthesis, include these terms in your description: oxygen, carbon dioxide, photon, glucose, water, chloroplast, thylakoid, xylem, stoma, chlorophyll.
In what process does adaptation lead to the creation of a new species? a. Mutation c. Speciation b. Adaptation d. Genetics
Answer:
This eventual process of speciation by natural selection is illustrated by a sketch ... The integration of genetics with models of natural selection shed tremendous ... processes which cause adaptation within species also tend to create new species. ... Darwin, C. On The Origin of Species by Means of Natural Selection,
Explanation:
In an organ transplant, a doctor transfers a donated organ from a recently deceased person to a live patient. One of the consequences is that the patient's immune system - the system that protects against diseases and pathogens in the body will reject the new organs. Explain why this consequence isn't a concern with organs grown from human cells
Answer:
The scientist would use the patient’s own stem cells to grow the organ. Because the cells are from the patient’s own body, the immune system won’t perceive the new organ to be a foreign body.
Explanation:
Answer:
The scientist would use the patient’s own stem cells to grow the organ. Because the cells are from the patient’s own body, the immune system won’t perceive the new organ to be a foreign body.
Explanation:
The scientist would use the patient’s own stem cells to grow the organ. if it uses cells from someone elses body the immune system wont work the way it should because its from a foreign body but if it uses its own cells then it'll work and won't see the cells from a foreign body
I REALLY NEED HELP ASAP. PLEASE BE SERIOUS AND SO NOT JUST TAKE THE POINTS. I WORKED HARD FOR THEM AND FOR ONCE I HAVE A QUESTION. PLEASR ANSWER!
Answer:
1-pacific plate
2-south America plate
3-nouth America plate
4-eurasian plate
8-juan de fuca plate
11- Caribbean plate
14-philipine plate
Explanation:
What is distillation?
Answer:
Distillation is the action of purifying a liquid by a process of heating and cooling.
which of the following is true about the Earth’s layers? A The asthenosphere is the thickest of Earth’s layers. B All of the layers are liquid and extremely hot. C There is little to no pressure on the solid core. D The Earth’s core has two different parts.
Answer:
D
Explanation:
The Earth’s core has two different parts is true about the earth's layer.
What is Earths core?
The extremely hot and dense core of our planet is called the Earth's core. Underneath the chilly, brittle crust and the largely solid mantle is the ball-shaped core.
Earth was a homogeneous ball of hot rock when it first formed roughly 4.5 billion years ago. The ball heated up even more due to radioactive decay and heat left over after planetary formation (the collision, accretion, and compression of space rocks).
After roughly 500 million years, our young planet's temperature reached 1,538° Celsius (2,800° Fahrenheit), the temperature at which iron melts. The iron age refers to this crucial period in Earth's history.
Therefore, The Earth’s core has two different parts is true about the earth's layer.
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What was available to humans to make their tools before metallurgy?
A: Humans used no tools.
B: Humans used their bare hands for tools.
C: Humans used wood, stone, and bones for tools.
D: Humans used natural metals they found on the ground.
Answer:
C
Explanation:
Before the advent of metallurgy, humans used wood, stone, and bones for tools.
What is metallurgy?It is a branch of science that deals with the properties of metals as well as their application in building useful metallic tools.
Metallurgy has helped man to develop several useful tools and equipment which are vital to the existence of man.
Before the advancement of technology, man use improvised tools made from wood, stones, and bones.
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Help me pleaseeeee!!!
Frogs live in pools of water that form inside large flowers in rain forest canopies. The flowers absorb nutrients from the frogs’ wastes. Which type of relationship is this?
Answer:
Mutual
Explanation:
frogs provide food for the pond or whatever and the pond stays fresh so the frogs can live their
Answer:
Mutualism
Explanation:
AP3X
Please take some time to help me really quick :)
Answer:
glycolysis
Explanation:
27. Which three planets were not known to ancient people?
a. Saturn, Jupiter, and Pluto u
b. Jupiter, Uranus, and Neptune
c. Uranus, Neptune, and Pluto
d. Mercury, Venus, and Saturn
Answer:
C. Uranus, Neptune, and Pluto
:)
The characteristics of all organisms and viruses are determined by the instructions carried in
Answer:
DNA
Explanation:
maybe... BUT PROBABLY YESS
Answer:
nucleic acids
Explanation:
Which type of mutation results in a frameshift mutation? Check all that apply.
substitution
insertion
deletion
point mutation
Which type of mutation adds one or more base pairs?
insertion
substitution
deletion
Insertion-deletion type of mutation results in a frameshift mutation changing the amino acid code for protein, hence options A and B are correct.
What is frameshift mutation?A frameshift mutation is produced via insertion and deletion. "indel" mutations, which stand for insertion or deletion mutations, result in frameshift mutations.
The way the DNA is read is altered by these changes. The nucleotides that follow in a DNA sequence can all be affected by a frameshift mutation, making them more likely to have severe effects.
A frameshift mutation is brought on by insertion and deletion, mutations from insertional or deletional mutations result in frameshift mutations.
Therefore, frameshift mutations happen when one or more nucleotides are added or removed, provided that the total number of nucleotides added or subtracted does not exceed three, disrupting the normal sequence of codons, hence options A and B are correct.
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When small solute particles or liquids are taken into the cell - what is it called?
Answer:
In cellular biology, pinocytosis, otherwise known as fluid endocytosis and bulk-phase pinocytosis, is a mode of endocytosis in which small particles suspended in extracellular fluid are brought into the cell through an invagination of the cell membrane, resulting in a suspension of the particles within a small vesicle .
Explanation:
Jellyfish live in salt water. They have organs (and cell organelles) that pump the salt out of their bodies. The jellyfish body is actually filled with fresh water. Animals like sea turtles and whales eat them even though there are few or no calories in a jellyfish. Use your understanding of osmosis to explain this.
Answer:
thanks
Explanation:
Answer:
The animals like sea turtles probably eat the jellyfish because they enjoy the flesh of the jellyfish, not the content of it inside.
Hope this helps you!
Presence of light is required for the light independent reactions. true or false
Answer:
false
Explanation:
the light-independent reactions do not use light as a reactant (and as a result can take place at day or night), they require the products of the light-dependent reactions to function
Describe the time of day that an early explorer might have planned to enter a harbor and when he might have planned to leave for his trip home. Explain the reasoning.
Answer:
I think he would want to arrive during high tide and leave during low tide.
Explanation:
name two types of cell that can go through the cell cycle an infinite amount of times
Answer:
red blood cells and nerve cells
Explanation:
The Hayflick Limit is a concept that helps to explain the mechanisms behind cellular aging. The concept states that a normal human cell can only replicate and divide forty to sixty times before it cannot divide anymore, and will break down by programmed cell death or apoptosis
this is for further explanation
what is the difference between cell membrane and visking tubing
Explanation:
cell membrane- is a semipermeable tissue that selectively allows the movement of materials in and out of a cell while a visking tubing is a artificial cee membrane
Answer:
Explanation:
Cell membrane is a semi permeable wall found in living cells . It is separate the inside cell from the the outside environment. This allow the movement of substances in and out of the cell. It allow diffusion of gases in and outside the cell.
Visking tubing is made of regenerated cellulose which look aliitle bit similar sellotape when it is dry. It is an artificial membrane that is similar to the cell membrane. It is a selectively permeable membrane with small pores that allow the movement of smaller molecules in through them.
During respiration, cells break down simple food molecules such as sugar and release the energy they contain.
True or false?
Answer:
During respiration, cells break down simple food molecules such as sugar and release the energy they contain. an energy releasing process that does not require Oxygen. In the mitochondria, the smaller molecules combine with oxygen to produce water and carbon dioxide. This reaction realeases a large amount of energy.
Explanation:
Answer:
i belive The answer is true
What subatomic particle changes the identity (element name) of an atom?
Answer:
♡Hi again, Susan! ♡
-- protons is your answer.
~Clara ✧･ﾟ: *
Explanation:
How is cancer spread through the body? Check all that apply.
through the nervous system
through the blood
through touching organs and tissue
Answer:
2
Explanation:
Answer:
Through the blood
Through organs and tissue
Explanation:
pls help me pls idk how to do this
Answer:
1. precipitation
2.condensation
3.precipitation
4.precipitation
5.precipitation
6.evaporation
7.evaporation
8.evaporation
(left to right each row)
Explanation:
precipitation is when something falls from somewhere (hail, snow etc)
condensation is when a gas (usually steam) turns into a liquid
evaporation is when a liquid turns gas.