Evolution — BIOLOGY STD 12 Science — Question

Mark the odd one in the following group.
Antipodal cells, Synergids, Zygote, Female gamete.

Define sexual reproduction.

Which ones of the following organisms exhibit binary fission?
Bacillus, Penicillium, Yeast, Amvebu.

Very small animals are rarely found in polar regions. Give two reasons.

What term do you give to the trait or character, which remains hidden in the F, hybrid or heterozygous condition.

Write a brief note on the work of Walter Sutton and Theodore Boveri?

State the stage at which oogonia reach their maximum number.

Name the unlabelled areas 'a' and of the pie chart representing biodiversity of vertebrates showing the proportionate number of species of major taxa.

Name an immune immunosupressive agent?

The following statements (i), (ii) and (iii) seem to describe the waterpollinated submerged plants. Which one of these statements is incorrect?

1. The flowers do not produce nectar.
2. The pollen grains have mucilaginous covering.
3. The brightly coloured female flowers have long stalk to reach the surface.