Anatomy of Flowering Plants — BIOLOGY STD 11 Science — Question

(i) Draw an illustrated diagram depicting the relationship between the pituitary gland and the hypothalamus.
(ii) How many parts is the adrenal gland cortex divided into? Name them. Which hormone regulates the secretion of this part?

Which one of the following sets of animals share a four chambered heart?

1. Amphibian, Reptiles, Birds.
2. Crocodiles, Birds, Mammals.
3. Crocodiles, Lizards, Turtles.
4. Lizards, Mammals, Birds.

Explain thrombocytes.

During the group study at Vishalthi's home, Anil got a severe pain in his stomach. Vishakha called her mother immediately as she (mother) was a doctor.
After diagnosis, stone is found in her kidney. She gave him some medicines and also suggested to drink a lot of water, so that the stone related problem does not arise again.

1. What is the medical term used for the stone in kidney?
2. Way should we drink a lot of water on the regular basis?
3. Name the ions which are involved in the formation of renal stones?
4. What values did vishakha’s mother possess?

Special character of coelenterates is:

1. Polymorphism.
2. Nematocysts.
3. Flame cells.
4. Hermaphroditism.

The walls of ventricles are much thicker than atria. Explain.

Biology teacher while taking class on respiration, told students that respiration is the characteristic feature of living beings, whether it is plant or animal. Ankita listened this, argued with her teacher and asked that plants do not have any structures for respiration then how can they respire. Teacher was impressed by Ankita's question and explained the students about respiration in plants.

1. In which cell organelle does respiration take place?
2. What compound is known as energy currency of the cell?
3. Where does aerobic and anaerobic respiration take place in a cell?
4. Which good quality is possessed by Ankita and her teacher?

All chordates possess:

1. Exoskeleton.
2. Limbs.
3. Skull.
4. Axial skeletal rod of notochord.

Distinguish between Hormone and vitamin.

Describe the following:
synapsis
Draw a diagram to illustrate your answer.