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environmental impacts on evolution mastery test
there are several mechanisms through which reproductive isolation occurs. which situation is an example of behavioral isolation?
a mules, the offspring of a male donkey and a female horse, are unable to reproduce because they are sterile.
b. the reproductive organs of snails only property align when the male and female belong to the same species.
c. males of different, closely related species of fireflies signal for mates by flashing different light sequences.
d. red and purple sea urchins cannot reproduce with one another because the sperm and egg cannot fuse.
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when the displaced particles are perpendicular to the direction the wave travels, is called a transverse wave, whereas in longitudinal wave the displace practices are parallel to the direction of the wave.

in the given image:

first image shows - longitudinal wave

second image shows - transverse wave

third image shows - longitudinal wave

fourth image shows - longitudinal wave

answer: zinc is the substance which has a volume of 1.38 .

density is defined as the mass of an object per unit volume.

it can be calculated by dividing mass of a substance by its volume i.e.

si unit of density is kg per cubic meter and cgs unit of the same is gram per cubic centimeter.

now from the given data volume can be calculated by the formula .

hence, the volume of aluminium will be = which comes out to be 1.703 .

similarly, volume of zinc, chromium, and nickel will be 1.378 , 0.869 , and 0.356 respectively.

the answer is d. embryo