BIOLOGY HIGH SCHOOL

Select all that apply. The vertebrate subphylum consists of _____.-tunicates
-sea squirts
-stingrays
-lamphreys
-trout

Answers

Answer 1
Answer: The answers are sting rays, lamphreys and trout. Subphylum vertebrata are chordates with backbones. Currently, there are approximately 64,000 species listed belonging to this group. They are sometimes referred as "Craniata".
Answer 2
Answer:

Answer:

sting rays, lamphreys and trout

Explanation:

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Which of the following scenarios is representative of parasitism?a. Tapeworms living in a mammal’s intestinal tract
b. Remora fish attaching themselves to sharks
c. Birds feeding on insects stirred up by grazing animals
d. Birds eating scraps of food from a crocodile’s teeth

Answers

Answer:

The correct answer would be a. Tapeworms living in a mammal’s intestinal tract.

Parasitism refers to the relationship between two organisms or species in which one organism lives in or on the body of the other.

The organism which lives on the body of the other is termed as the parasite while the other organism is termed as the host.

The parasites derive their nutrition from the host but they do not kill their host at once.

Examples may include tapeworm, hookworm, Plasmodium,flukes, fleas et cetera.

The tapeworm are the flat segmented flatworm that live as parasite in the intestine of the mammals. They derive their nutrition from the partly digested food of the host. It deprived the host of nutrients.
A because tapeworms are harmful organisms that slowly take the nutrients away from its host, in this case the mammal, which is considered a parasitism relationship.

What do food webs help us understand?a. population effects of growth
b. ecological effects of energy
c. ecological effects of extinction or species introduction
d. species relocation

Answers

Food webs help us understand the ecological effects of extinction or species introduction - C. This is also the correct answer because when we introduce a new species in a certain environment, we're effectively changing this environment and changing the food web as well. For that reason, we create an ecological effect when it comes to the extinction of one species for example. 

In conditions of stress or fear, the human adrenal gland may produce adrenaline. Which of the following is an effect adrenaline can have on the body?

Answers

Adrenaline can activate the "fight or flight" mode for people who suddenly get the rush of adrenaline pumping through their body. This can make them either run really fast, react faster, think faster, or even find it necessary to fight for their lives. It can also be a way of showing excitement as to get the body more active for other things and activities.

An athlete always runs some distance before taking a jump. Why?

Answers

To gain inertia as it gives them more speed behind their jump because without it they would not be able to jump far

Which of the following will lead to speciation? Select one of the options below as your answer:



A.
Variation in gene pool




B.
Lack of mutations




C.
Absence of natural selection

Answers

The correct answer is A. Variation in gene pool

Variations cause genetic drift and speciation while absence and lack of natural selection do quite the opposite, they keep us the same.

Which of the following is NOT a nitrogen base in DNA?A. Uracil
B. Thymine
C. Cytosine
D. Guanine

Answers

A is the correct answer 
A) Uracil.
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