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

Give the scientific name of the parasite that causes malignant malaria in humans. At what stage does this parasite enter the human body? Trace its life cycle in human body.

How is a primary spermatocyte different from a secondary spermatocyte?

The below image shows is the headquarter of Eli Lilly company. Eli lily is one of the first pharmaceutical companies to produce human insulin using RDT technology by cell-based fermentation method.

i. How did Eli Lilly synthesize human insulin?
ii. Mention one difference between this insulin and the one produce by the human pancreas.

Draw a well labelled diagram of mature graafian follicle.

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.

Who are likely to suffer more from the defect related to the gene represented the males, the females or both males and females equally? And why?

What is linkage, write the chromosomal theory of genetics. How many types of linkage are there.

‘‘A very small sample of tissue or even a drop of blood can help determine paternity’’. Provide a scientific explanation to substantiate the statement.

Write the specific symptoms of acquired immunity.

Explain how do they act as effective contraceptives in human females

What is the name of network formed by the fusion of open ends of seminiferous tubules? Where does this network lead to?