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Travka [436]
3 years ago
7

The words ""antigen"" and ""virus"" are interchangeable.

Biology
1 answer:
andrew11 [14]3 years ago
6 0

Answer:

False

Explanation:

A virus (which is a pathogen) has a lot of antigens on its surface, so they can't be used interchangeably.

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The energy pyramid shown above represents a valley ecosystem. Which transfer of energy shown below is most likely?
nadya68 [22]
A transfer of energy in practice means that one organism eats the other organism, so here we have to ask whether the first organism is eaten by the second.

A. from rabbits to green plants

Plants don't eat rabbits so -no!

B. from weasels to eagles
-this is the correct answer! Eagles do prey on weasels and eat them whenever they can

C. from eagles to rabbits
Rabbits don't  eat eagles -so, no!

D. from green plants to weasels

Weasels are predators so they don't eat plants!

7 0
3 years ago
Which of the following is not a main characteristic of a mineral?
ladessa [460]
The answer is A. Man-made
3 0
3 years ago
How are ecosystems named?
almond37 [142]
<span>Ecosystems are named according to the vegetative inhabitants of the ecosystem which means that the answer is B. by the plants that inhabit the ecosystem. The plants themselves however depend on the climate that is found in the place where they are found, which means that they wouldn't be able to thrive and spread in any other ecosystems.</span>
7 0
3 years ago
In addition to mutations, genetic variation can also arise during the formation of gametes during meiosis. During meiosis I, hom
amm1812

Answer:

Crossing over ensures that organisms of the same parents have differences in genetic content making them unique in one way or the other.

Explanation:

This question is describing the process of crossing over, which occurs only during prophase I of meiosis. During the process of crossing over, alleles of a gene are exchanged between non-sister chromatids of homologous chromosomes (mother and father chromosomes).

Hence, a unique GAMETE that has been genetically recombined will be formed. When these gametes are fertilized (egg) or fertilizes (sperm), organisms that are genetically different from their parents are produced. This ensures genetic variation, which is a difference in the genetic content of organisms.

5 0
3 years ago
What does BAC stand for
Alenkasestr [34]

Answer:

blood alcohol concentration

Explanation:

we studied that recently so I could recall

5 0
3 years ago
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