Plant Growth and Mineral Nutrition — BIOLOGY STD 12 Science — Question

Name the largest cell of the embryo sac.

Name two contrasting pod-related traits studied by Mendel, in pea plant experiments.

Name the scientists who were awarded the Nobel Prize for discovering the potential of Penicillium.

Enlist the characteristics of S-strain pneumoniae.

A haemophilic man marries a normal homozygous woman. What is the probability that their daughter will be haemophilic?

How do cytokine barriers provide innate immunity in humans?
OR
How do cytokine barriers help in evading viral infections?

OR
How do interferons protect us?

When a tall pea plant was self-pollinated, one-fourth of the progeny were dwarf. Give the genotype of the parent and the dwarf progenies.

How many sperms are present in single ejaculation?

Name the initiator codon of protein synthesis.

Mrunmayi is called universal blood acceptor. What is her blood group?