Organisms and Populations — BIOLOGY STD 12 Science — Question

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.

How does Penicillium reproduce asexually?

What is gene gun (biological)? Write one use of it.

Name the type of flower which favours cross pollination.

What is Evolutionary Biology?

Name the parts of pistil which develop into fruit and seeds.

Why are proteins either positively or negatively charged?

Malaria, typhoid, pneumonia and amoebiasis are some of the human infectious diseases. Which of these are transmitted through mechanical carriers?

Define dihybrid cross.

Name any two diseases of poultry.