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Serga [27]
3 years ago
8

Which pair of characteristics would you use to place a fish in one of the three fish classes: agnatha, cartilaginous fishes, or

bony fishes?
Biology
1 answer:
Serhud [2]3 years ago
5 0
The pair of characteristics that one must use to classify a fish is the presence of jaw and skeleton type. Agnatha fishes are also called jawless fishes and they lack bony skeletons. Cartilaginous fishes are composed of cartilage skeletons. Bony fishes have bony skeleton structures.
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Which finches would be most like the ancestral finch?
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3 years ago
Population A consists of 100 hens that are fully isogenic and that are reared in a uniform environment. The average weight of th
qaws [65]

Answer:

a. the environmental variance (VE) = 3.5 g ²

b. 17.5 g ² for population

c. the heritability of broad sense (H2) = 0.83

Explanation:

a.With the information we have we can infer that environmental factors influence A, which is considered isogenic, thus, the environmental variance (VE) = 3.5 g ²

b.When studying population B, comparing it without environmental changes with respect to population A, we found that its total variance (VT) = 21.0g ²

We generate the following formula with the data obtained previously to find the genetic variation

VT = VE + VG

then VG = VT-VE

replacing data:

VG = 21.0 - 3.5 = 17.5 g ² for population

c. Regarding the heritability of broad sense (H2) in population B, we can reach the result with the data previously obtained like this:

H2 = VG / VT = 17.5 / 21.0 = 0.83

7 0
3 years ago
Which of the following structures contain receptors that monitor changes in head rotation? Which of the following structures con
erica [24]

Answer:

The answer is A.

Explanation:

The inner ear parts are responsible for one of the most important sensory responsibilities in our body which is the keep us in balance and provide us with a sense of stability. It is made of three parts named semicircular canals, vestibule and cochlea.

The structure that contains the receptors mentioned in the question and helps us with our head movements to keep our heads horizontally and vertically in the correct position is called "The Saccule" and it is a part of the vestibule part of the inner ear.

I hope this answer helps.

7 0
3 years ago
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