Answer:
B
Explanation:
We never see short bristle males, suggesting some type of lethality. I.e. any males who inherit the mutation die before birth so we don't see the phenotype. This also hints that it could be X-linked.
Females can be short bristled, but males can't, as it is likely lethal. This suggests that having one copy of the short bristle trait without the long bristle trait is lethal (as males as XY and so only have one copy of the trait). The female then must be heterozygous for the short bristle trait (which also explains how in generation F2, long bristle males can be produced, as if she was homozygous males would all be short bristled, and therefore dead, so there would be no males.
Since the first short bristle female is heterozygous, the trait for short bristles must be dominant.
However, since evidence suggests the trait is X-linked, it cannot be autosomal, as suggested in B.
<em><u>Explanation:</u></em>
It's the same thing as saying, why can't I see a atom with my bare eye???
The trees and cities are just WAY too small and far away for us to see if we were in outer space.
Answer:
It was a non-seed-bearing plant, or sporophyte, such as a moss, liverwort, or hornwort.
Explanation:
All plants have spores as part of their life cycle (alternating between sporophyte, which is asexual, and gametophyte, which uses sexual reproduction), but because the spores of this fossilized plant were used for reproduction, this plant most likely did not produce any seeds.
Answer:
<em>There is latency in this infectious disease.</em>
Explanation:
A latent viral infection is a form of recurrent viral infection that differs from a chronic viral infection.
Latency is the period in the life cycles of some viruses in which the replication of virus particles stops after initial infection.
The viral genome, moreover, is not entirely eliminated.
