Human Health and Disease — BIOLOGY STD 12 Science — Question

In which organ occurs storage and maturation of sperms?

Name and state the law of Mendel, which explains the expression of only one of the parental characters in the F₁-generation of a monohybrid cross.

By what Latin name the first hominid was known?

A bilobed, dithecous anther has 100 microspore mother cells per microsporangium. How many male gametophytes this anther can produce?

Why, in a test cross, did Mendel cross a tall pea plant with a dwarf pea plant only?

When and at what end does the ‘tailing’ of hnRNA take place?

Name the type of evolution that has resulted in the development of structures like wings of butterfly and bird. What are such structures called?

Given below are some human organs. Identify one primary and one secondary lymphoid organ: Liver, Thymus, Stomach, Thyroid, Tonsils.

The royal botanical garden took ......... tree from Brazil:

1. Neem
2. Turmeric
3. Rubber
4. All of the above