What two types of cells are involved in immune response and have the job of creating a "memory" of exposed pathogens? *
a)A cells and B cells
b)T cells and A cells
c)T cells and B cells
d)red and white blood cells

Answers

Answer 1

Answer:

B  

Explanation:


Related Questions

Explain in-detail the method of blood grouping and why should we do that?

Answers

Blood typing is a method to tell what type of blood you have. Blood typing is done so you can safely donate your blood or receive a blood transfusion. It is also done to see if you have a substance called Rh factor on the surface of your red blood cells.

What are some things that may cause weathering and erosion?
Choose all that apply:
-Rain
-Rivers
-Wind
-Volcanoes

Answers

Answer:

Rain,  Rivers , Wind

Which of the following correctly describes the relationship between speed and velocity? (4 points)
Speed is the change in velocity over time; velocity is distance plus direction.
Speed is the change in distance over time; velocity is speed plus direction.
Speed is distance plus direction; velocity is speed plus time.
Speed is the change in acceleration; velocity is distance over tim

Answers

Answer: Speed is the change in distance over time; velocity is speed plus direction.

Explanation:

While speed does not include direction, velocity does

For example: If I was traveling North at 5 mph,

The speed would be 5 mph

while the velocity would be 5 mph North


Help pleaseeeee fasttt

Answers

I believe the answer is DNA

Who developed virtually the same theory of evolution?
Select one:
O a. Wallace
O b. Malthus
O c. Lamarck
O d. Lyell

Answers

Answer: I’m pretty sure it's Lamarck

Explanation:

I’m sorry if it’s wrong

I believe its Wallace because the question asked for SAME THEORY OF EVOLUTION

Which statement best explains how a light wave behaves when moving from air to water?A:it speeds up and bands B:it slows down and bands C:it speeds up and continues straight D:it slows down and continues straight.

Answers

Answer:

it speeds up and bends

Explanation:

common sense lol

The statement that best explains how a light wave behaves when moving from air to water is "it slows down and continues straight." That is the last option, i.e., option D, as light travels more slowly in water.

What is the significance of the waves at different mediums?

Waves react differently in different mediums, such as when the phenomenon of refraction is used in many optical devices such as lenses, prisms, and mirrors, and these devices change the property of light to slow down and bend when moving from one medium to another. In microscopes and telescopes, the study of light refraction has provided important insights.

Hence, the statement that best explains how a light wave behaves when moving from air to water is "it slows down and continues straight." That is the last option, i.e., option D, as light travels more slowly in water.

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how are diffusion and endocytosis similar?

Answers

Endocytosis and exocytosis are similar in that they are both forms of cell transport. They differ because in endocytosis, a cell transports molecules into a cell (think: endo - in), and in exocytosis, the cell's molecules are transported by being expelled.

please help!! il give brainlist

Answers

which question do u need help with??

Answer:

1-they are cats

2-different colors

3-orange.white.and black

Explanation:

what are the two types of ATP production available in our muscles?

Answers

Answer:Muscle cells are able to produce ATP with oxygen, which is called aerobic respiration, or without oxygen, an anaerobic process called anaerobic glycolysis or fermentation. The process in which ATP is made is dependent on the availability of oxygen (see the Cellular Respiration concepts).

Explanation:

Can depletion of the ozone cause a rise in skin cancer among humans? Explain

Please help

Answers

Yes because when the ozone layer gets ruined and it causes more sunlight and UV rays to hit the surface of the earth, so if you are out in the sun it causes you to have more light and UV rays that will effect your skin especially if you are not wearing sunscreen. Over a period of time if you are still in the sun there is a possibility that you will get skin cancer due to the higher UV levels and sunlight

How is carbon moving between the air and found decreasing

Answers

Answer:

It moves with the help of hydrogen

HELPP PLEASEEEE FASTTTT

Both parents in the example carry the dominant and the
recessive alleles for a trait (heterozygous). What is the
probability of the offspring expressing the recessive
phenotype?

Answers

Answer:

25%.................

Answer:

D, 25%

Explanation:

We can do this with simple math! Since we have a 1:4 ratio of possibly expressing the recessive phenotype, we will do 1/4.

1/4 = .25

Then, we will multiply this by 100, which results in 25.

anyone know these please help me out i need a lot of help

Answers

Answer:

1. False

2. True

3. True

4. True

Explanation:

1. Not all mutations are bad! Some actually can provide people with advantages.

2. Back to number 1, yes! Some mutations can give you advantages that people would not normally have.

3. Yes! Melanin helps protect our skin from damage from UV rays from the sun. This is why people with lighter skin tend to “tan” or “burn”.

4. Yes! Mutations are often a random process. We cannot determine whether or not someone will be born with or without a mutation.

Which gene mutation would have the greatest impact on a protein's amino acid sequence?​

Answers

Answer:

heyyy there fellow weeb, thought id help u with this.

Explanation:

The addition of 2 bases is the most severe of these mutations. Because of a triplet reading of the genetic code, a 2 base insect changes the code readings frame that causes a frameshift mutation that means that each amino acid is incorrect after the mutation's site.

Write a scientific explanation that explains how oxygen and carbon dioxide travel within the seed and the egg.

Answers

The two membranes pull apart a little and create a small pocket or sack of air. As the developing bird grows, it breathes in oxygen from the air sack and exhales carbon dioxide. Several thousand microscopic pores all over the surface of the egg allow the CO2 to escape and fresh air to get in.

Please mark brainliest :)

Carbon dioxide and oxygen travel within the seed and egg to break the energy or food inside the seed or egg. It comprises schematic steps which are responsible for these functions.

What do you mean by Seed?

Seed may be defined as the unit of reproduction of a flowering plant, capable of developing into another such plant.

The oxygen enters the seed and gets absorbed by the seed coat. It makes the seed coat wet and soft due to oxygen absorption. This oxygen now combines with energy that is stored inside the seed. The level of carbon dioxide increases when the process of photosynthesis will be initiated.

Therefore, carbon dioxide and oxygen travel within the seed and egg to break the energy or food inside the seed or egg.

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what is the best explanation scientists have been able to come up with for the appearance of Ostrich-like birds in different continents

Answers

Answer: B. The distribution of some groups of ostrich like birds may have been influenced by continental drift in what is known as Pangea.

Explanation:

Answer:

B. The distribution of some groups of Ostrich-like birds may have been influenced by continental drift in what is known as Pangea

Explanation:

Logging involves people cutting down trees to acquire timber for uses such as building homes and making paper. How would logging affect a pine forest ecosystem? Choose the two that apply.

Answers

Answer:

Deforestation

Explanation:

When logging is applied in pine forest the organisms in the ecosystem as to go to extinction

Answer:

It would change the plant populations in the area.

It would change the animal populations in the area.

Explanation:

Describe at least three ways in which viruses, bacteria, protists, or fungi are important in your daily life.

Answers

Answer: hem living in and on your body that are beneficial to you. ... heating it to at least 71.6°C for only 15 s. ... List three ways fungi are important to the environment.

Explanation:

1. Insects Have three pairs of legs or are the ______ arthropods.
4. ______ have two body segments and have no antennae
6. Butterfly is an exxample of an _______
7. This animal is an example of exoskeleton.
8. _____ are invertebrates that people can eat
9. _____ is an example of shellfish.
10. Snail is an examole of _____
pick your answer below
-eight
spiders
worm
snail
shrimp
six legged
antennae
mollusks
insects
shellfish

Answers

Answer:

1. Six legged

4. Spiders

7.snails

8. Shrimp

9.Mollusks

10.worm

Explanation:

Insects have three pairs of legs or are the six legged arthropods.

What is a arthropod?

Invertebrates with an exoskeleton, segmented bodies, and paired jointed appendages are known as arthropods. Arthropods are classified as members of the phylum Arthropoda.

They are distinguished by their jointed limbs and cuticle, which is frequently mineralized with calcium carbonate. Arthropods have an external skeleton and are bilaterally symmetrical.

1. Insects have three pairs of legs or are the six-legged arthropods.

4. Spiders have two body segments and have no antennae.

6. Butterfly is an example of an insect.

7. This animal is an example of exoskeleton- Snail

8. Shrimp are invertebrates that people can eat.

9. Mollusks is an example of shellfish.

10. Snail is an example of worm.

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Which statement best describes the chemical substances secreted by the endocrine glands?

Answers

Answer: B if its wrong so be it

Explanation:

Which level of organization forms the fundamental base for all other levels
in the hierarchy of life? *
Cell

O Tissue
Organ
Organism

Answers

Answer:

organ

Explanation:

The highest level of organization for living things is the biosphere; it encompasses all other levels. The biological levels of organization of living things arranged from the simplest to most complex are: organelle, cells, tissues, organs, organ systems, organisms, populations, communities, ecosystem, and biosphere.

The biological level of organisation range from organelle to biosphere. Therefore, option (A) cell  forms the fundamental base.

What do you mean by hierarchy of life ?

Cells join to form tissues in larger animals, which are clusters of similar cells performing similar or related jobs. Organs are groups of tissues that work together to fulfill a certain task. Organs can be found in both plants and animals. An organ system is a more advanced level of organization made up of organs with similar functions. 

A population is the aggregate term for all members of a species that are present in a given location. An ecosystem is made up of all the living things that exist in a specific location as well as the abiotic, non-living elements of that environment, such as soil nitrogen or rainwater. The biosphere is a group of organisms that is organized at the highest degree possible.

Thus, option (A) cells forms the fundamental base for all other levels

in the hierarchy of life.

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Aeroplanes can fly ,just like birds.However,they are not considered living organisms .Give 4 reasons

Answers

1. they aren’t made of cells
2. they do not reproduce
3. they do not grow or develop
4. they do not respond to their environment

hope this helps!

why use fingertip to detect braille symbol but not palm of hand​

Answers

Answer:

the fingertip has more censors and nerves connected to the skin as compared to the palm

As the medical examiner performs an autopsy on a body found in a nearby forest, she collects sand from between the victim's toes
that is identical to sand from a beach located 20 miles from the scene. What is the most important reason that this is relevant to
the case?
A)
It suggests that the victim may have drowned.
B)
It suggests that the victim may have taken a recent vacation.
0
It suggests that the crime may have occurred at another site.
D
It suggests that the suspect may have been to the beach recently.

Answers

Answer:

It suggests that the crime may have occurred at another site.

List the three layers of the rainforest

Answers

Answer:

Canopy, understory, and forest floor.

Explanation:

Hope that this helped you :D

describe how the skin works when the place is very hot​

Answers

Answer:

when body temperature rises, such as when exercising on a hot day, the dermal blood vessels will dilate, in the sweat glands begin to secrete more sweat. the invaporation of the sweat from the surface of the skin cools the body by dissipating heat.

Explanation:

Hope this helped Mark BRAINLEST!!!

Answer:

When it is hot, we normally sweat. Sweating removes the heat energy from our skin. Our blood vessels open up which lets more blood flow. This allows a way for the heat to be lost. It lets your body cool down or try and cool down.

The diagram below shows a cell placed in a solution.

A cell is shown placed inside a beaker. It is labeled Cell. The solution inside the beaker is labeled 40% salt solution and the solution inside the cell is labeled 20% salt solution.

Only water is allowed to move in and out of the cell. What will most likely happen to the cell?

It will expand as water moves out of it.
It will shrink as water moves out of it.
It will expand as water moves into it.
It will shrink as water moves into it.

Answers

Answer:

it will expand as water moves hope this helps!

Explanation:

SI UNA PERSONA AUMENTA LA CANTIDAD DE GRASAS DE ORIGEN ANIMAL EN SU DIETA, EL CONTENIDO DE COLESTEROL EN LA SANGRE TAMBIÉN AUMENTA. POR LO TANTO, EN LAS PAREDES DE LOS VASOS SANGUÍNEOS SE PUEDEN ACUMULAR PLACAS DE GRASA Y COMO CONSECUENCIA

Answers

Answer:

Eso es verdad. Como esta tu dia :)

Explanation:

In the Hershey Chase experiment components of bacteriophages were labeled with radioactive isotopes of sulfur and phosphorus What was
the Hershey-Chase evperiment designed to determine?

Answers

Answer:

c

Explanation:

It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.

What was  Hershey-Chase experiment?

The Hershey-Chase experiment, also known as the "Blender Experiment," was a classic experiment in molecular biology that was conducted in 1952 by Alfred Hershey and Martha Chase. It was designed to determine whether the genetic material of the bacteriophage (a type of virus that infects bacteria) is made of DNA or protein.

In the experiment, components of the bacteriophage were labeled with radioactive isotopes of sulfur and phosphorus. The labeled phages were then used to infect bacterial cells, and the cells were subjected to various treatments to separate the viral components from the bacterial components.

The results of the experiment showed that the genetic material of the bacteriophage was made of DNA, not protein. This was determined by the fact that the labeled DNA, but not the labeled protein, was able to enter the bacterial cells and infect them. This experiment provided strong evidence for the "central dogma" of molecular biology, which states that genetic information flows from DNA to protein, but not the other way around.

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Scientists have studied a fruit fly, Drosophila, to better understand early embryonic development and have discovered that the cell cycle changes as embryonic development proceeds. Model A represents the first 13 cell cycles after fertilization, which only includes two phases. Model B represents cell cycles 14 through 16, which are more complex and include a G2 phase. The figure shows two circular models, labeled Model A and Model B, that represent the cell cycle of fruit flies after fertilization. Model A represents cell cycles 1 through 13, and it contains two phases. Model B represents cell cycles 14 through 16, and it contains three phases.
What of the following explains the advantage of a G2 phase during embryonic development?
A Cells can undergo the cell cycle more quickly with a G 2 phase.
B Cells can replicate more DNA with a G2 phase.
C Cells are checked for DNA damage before entering mitosis with a G2 phase.
D Cells are able to produce two new daughter cells with a G2 phase.

Answers

Answer:

C. Cells are checked for DNA damage before entering mitosis with a G2 phase.

Explanation:

G2 phase is very important phase of cell division in which cells are checked for DNA damage before entering mitosis with a G2 phase as well as correct duplication of the DNA is also verified and cell proteins that are necessary for cell division are also produced. This phase comes after S stage in which replication of DNA occurs so this G2 phase check the damages before starting of mitosis.

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