Mineral Nutrition — BIOLOGY STD 11 Science — Question

Mention how long does the cell division proper last in a human cell cycle and what per cent of duration of cell cycle does interphase last.

State the proenzymes which are found in pancreatic juice.

Arrange the following in the sequence in which you would find them in a plant starting from the periphery: Pericycle, Epidermis, Pith, Endodermis, Cortex.

Name the stage of cell cycle at which one of the following events occur: Pairing between homologous chromosomes takes place.

Large number of stomata are seen on lower surface of dicot leaves or on the upper surface?

Flatworms have ________ for osmoregulation and excretion.

Name the part of alimentary canal of cockroach,

1. That has a cuticular lining.
2. Where food is temporarily stored.

Enlist the types of chromosomes based on the position of centromere.

What is the difference between a heart attack and cardiac arrest?