Sexual Reproduction in Flowering Plants — BIOLOGY STD 12 Science — Question

Name the term used for metamorphosis of spermatids?

Study the graph given below and answer the question that follow:

1. Write the status of food and space in the curves (a) and (b).
2. In the absence of predators, which one of the two curves would appropriately depict the prey population?
3. Time has been shown on X-axis and there is a parallel dotted line above it. Give the significance of this dotted line.

Given below is the representation of amino acid composition of the relevant translated portion of b-chain of haemoglobin, related to the shape of human red blood cells.

What difference would be noticed in the phenotype of the normal and the sufferer related to this gene?

Given below is the representation of amino acid composition of the relevant translated portion of b–chain of haemoglobin, related to the shape of human red blood cells.

Is this representation indicating a normal human or a sufferer from certain related genetic disease? Give reason in support of your answer.

Explain how biodiversity is important for human.

List three symptoms of high altitude sickness and state three adaptations to overcome it.

Mention the three attributes that a stable community has.

Haemophilia and sickle-cell anaemia are blood related Mendelian disorders. Yet, they differ in their pattern of inheritance. Explain the difference.

(i) Which is that specific geographical area where these organism are found?
(ii) Name and explain the phenomenon that resulted in the development of so many dive species in this region.
(iii) Explain by writing the reasons how it was possible for the placental Wolf and Tasmanian wolf to live together in the same environment?

Explain the inheritance of hemophilia?