Transport in Plants — BIOLOGY STD 11 Science — Question

What is the difference between cutaneous and pulmonary respiration?

In a slide showing different types of cells, can you identify which type of the cell may be meristematic and the one which is incapable of dividing and how?

Which one of the following in birds, indicates their reptilian ancestry?

1. Scales on their hind limbs.
2. Four chambered heart.
3. Two special chambers crop and gizzard in their digestive tract.
4. Eggs with a calcareous shell.

Write short note on the function of Thymosins

Mention four characteristics of metabolic pathways.

Which of the following is an example of an oviparous mammal?

1. Macropus.
2. Ornithorhynchus.
3. Delphiunus.
4. Felis.

The skull bones are the strongest bones in the body and thus the brain gets the best protection in the body. In the light of this statement, which of these is true? How will you raise awareness about wearing helmet?

1. We do not need a helmet because skull is enough to take care of the brain.
2. We can manage with a poor quality helmet so that the police does not catch us.
3. Helmets are very important because they help in saving the most important organ; the brain.

A cell has 32 chromosomes. It undergoes mitotic division. What will be the chromosome number (N) during metaphase? What would be the DNA content (C) during anaphase?

What name is given to the body fluid of cockroach? Mention its components.

Peptide bonds are formed between two groups. Name them.