1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ankoles [38]
2 years ago
12

Differentiate between positive and negative mass selection.

Biology
1 answer:
Eduardwww [97]2 years ago
7 0

Answer:

Positive selection involves targeting the desired cell population with an antibody specific to a cell surface marker (CD4, CD8, etc.). ... Negative selection is when several cell types are removed, leaving the cell type of interest untouched.

You might be interested in
The faster a cheetah can run, the more likely it is to capture its prey. Cheetahs with longer legs are able to run faster than t
stealth61 [152]

Answer:

D

Explanation:

This is the more likely explanation, as there must be a limit to leg length in an animal that has to run very fast and strain their muscles and bones to the limit to do so.

As for the other options, there is no evidence to conclude that the genes that are involved in cheetahs leg length do not undergo mutation because the population exhibits a variety of leg lengths. Neither can we conclude that there are any isolated subgroups in the pupulation. Natural selection does act upon the traits involved in predation, as the question starts by saying that the faster a cheetah can run the more likely it is to capture its prey.

8 0
2 years ago
What are the qualities of a greenhouse gas
Fynjy0 [20]

Answer:

Carbon dioxide, methane, and water vapour are the most important greenhouse gases.

3 0
3 years ago
Please help! Match each organism with the correct trophic level it occupies in the food chain.
ale4655 [162]

Blueberry: 1st Trophic Level

Rabbit: 2nd Trophic Level

Snake: 3rd Trophic Level

Cat: 4th Trophic Level

Hope this helps :P

plz give me the brainliest if it does : )

7 0
3 years ago
Read 2 more answers
Which is an advantage of genetic engineering?
lesya [120]
<span>One of the advantages of genetic engineering is the ability to add vitamins and minerals supplements to food. The correct option is D. The other options given are disadvantages of genetic engineering. Apart from the advantages given here, genetic engineering has other merits, such as production of better agricultural products, increasing shelf life of products, elimination of diseases, etc.</span>
4 0
3 years ago
Read 2 more answers
The Morphology of Homo erectus:__________.This species weighted well over 100 pounds, with an average height of about 5 feet 6 i
Katen [24]

Answer:

They had a large brain size of 700 to 1,250 cubic centimeters and large brow ridges with a nuchal torus at the back of the skull.

Explanation:

<em>Homo erectus</em> was one of the species of the homo genus which were considered the first species to have the human-like the feature that is they can stand upright on two legs and were therefore referred to as the upright man.

They showed many evolutionary advances over their ancestors called Homo Australopithecus as they showed encephalization. Encephalization refers to the increase in the size of the brain due to more neuronal complexity and neurogenesis and they possessed about 750 to 1250 cc brain size.

They showed torus at the back of the muscle which can hold the muscle of the neck and also showed the large brow ridges in the front of the skull.

Thus, the selected option is the correct answer.

3 0
3 years ago
Other questions:
  • Construct a dialogue between your friend about the online class​
    10·2 answers
  • What is the role of enzymes in the DNA replication process?
    8·2 answers
  • ¿Cuál fue la aportación de Robert Remak a la teoría celular y su relación con Rudolf Virchow?
    5·1 answer
  • Some arctic species like the arctic fox (pictured above) grow white fur only in winter. In summer, it is a brown color. What exp
    7·2 answers
  • What would happen in an ecosystem without herbivores? A. The populations of secondary consumers would decrease.. . B. The popula
    9·2 answers
  • Algae and multicelluar are autotrophs because they
    13·1 answer
  • Restriction endonucleases are especially useful if they generate sticky ends. What makes an end sticky?
    8·1 answer
  • Chlorophyll is type of pigment and so is the melanin in your skin what is a pigment
    10·1 answer
  • In radishes, the gene that controls color exhibits incomplete dominance. Pure-breeding red radishes crossed with pure-breeding w
    5·1 answer
  • Which of the following is a key characteristic of metaphase?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!