Question

>Intersexual selection is direct competition among individuals of one sex (often males) for mates of the opposite sex. (True/False)

> Frequency-dependent selection is a type of balancing selection. (True/False)

> The appearance of clear boundaries between adjacent biomes is an important feature of most terrestrial biomes. (True/False)

> The basal cell developed from the first mitotic division of the zygote gives rise to most of the embryo in angiosperms. (True/False)

> In some eudicots, the coleoptile in the seeds pushes up through the soil, creating a tunnel for the shoot tip to grow through. (True/False)

Answer 1

1) True, this is mate choice and the better male is selected by female for mating. Thus, competition exist between males for mating.

2) True, this is because here less common phenotype is favoured resulting in a balancing selection.

3) True , this basal cell is called embryonal cell. This will make up the embryo body in both dicots and monocots. Upper cell is the suspensor cell.

4) False, the coleoptile is absent in eudicots , as it is the feature of monocots only. Along with this coleorhiza is also absent in dicots and present in monocots.

It is the protective sheath on plumule.