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iris [78.8K]
3 years ago
11

What are 3 adaptions that frogs have that make them amphibians?

Biology
2 answers:
Umnica [9.8K]3 years ago
6 0
1) They are cold blooded
2) They respire both by Skin and lungs.
3) They lay eggs in water ; they have a 3 chambered heart.
melomori [17]3 years ago
4 0
Webbed feet, cold blooded, and they live in moist areas
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In a hardy-weinberg population with two alleles, a and a, that are in equilibrium, the frequency of the allele a is 0. 3. What i
zavuch27 [327]

Here, given-

homozygous alleles 'a' have a frequency of 0.3.

Also the alleles are in equilibrium in a Hardy-Weinberg population. The frequency of individuals that are homozygous for this allele are= 0.49.

The Hardy-Weinberg equilibrium can be defined as the principle which states that the variation in the genetic makeup of a population remains constant and unchanged till there are no external interferences, influencing the population.

Calculation-

p + q = 1\\0.3 + q= 1\\q= 1- 0.3\\\\q= 0.7

Then to find the frequency of the individuals homozygous for this allele the following formula needs to be used-

p^{2} + 2pq + q^{2} =1

p^{2} = dominant homozygous frequency\\2pq= heterozygous frequency\\q^{2} = recessive homozygous frequency\\

Thus, the individuals homozygous for the allele can be calculated by q^{2} = (0.7)^{2} \\= 0.49

Learn more about the Hardy-Weinberg equilibrium here-

brainly.com/question/16823644

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4 0
2 years ago
which type of contraction allows a muscle to produce tension without changing the angle of a skeletal joint
JulsSmile [24]

Answer:

isometric contraction

Explanation:

An isometric contraction occurs as the muscle produces tension without changing the angle of a skeletal joint. Isometric contractions involve sarcomere shortening and increasing muscle tension, but do not move a load, as the force produced cannot overcome the resistance provided by the load.

8 0
2 years ago
At the equator, there are no
NISA [10]

The reason why at the equator, there are no summers or winters, only wet and dry seasons is : Because at the equator the daytime, night time, temperature and sunlight are moderate.

<h3>Meaning of equator</h3>

An equator can be defined as an imaginary line that runs from west to east thereby dividing the earth into two equal part.

The equator divides the earth into the northern and southern hemispheres. because the equator is at the middle every thing that is experienced there is moderate, unlike the those at the polar region.

In conclusion, The reason why at the equator, there are no summers or winters, only wet and dry seasons is Because at the equator is at the middle and therefore the daytime, night time, temperature and sunlight are moderate.

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4 0
2 years ago
When a sound is moving toward the observer the observer will hear a higher pitch. This is due to
kirza4 [7]

The answer is The Doppler Effect.  It is named after the Austrian physicist Christian Doppler, who described the phenomenon in 1842.

5 0
3 years ago
Please answer quickly!!!!!!!!!
natka813 [3]

Answer:

They both have cell wall

3 0
3 years ago
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