Chemical Coordination and integration — BIOLOGY STD 11 Science — Question

What are chiasmata? What is their significance?

Why is Kreb's cycle also called TCA cycle? Write the first step of the reaction in this cycle.

Explain Blackman's law of limiting factors. Explain it with the help of a suitable example.

What is correct about Taenia?

1. Male organs occur in posterior proglottids.
2. Male organs occur in anterior proglottids.
3. Female organs occur in anterior proglottids.
4. Mature proglottids contain both male and female organs

Write the floral formula and draw the floral diagram of the family liliaceae.

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?

Write the functions of the following
 Cell wall

Meiosis is advantageous than mitosis as it produces variations so plays important role in evolution. What are the stages during which chances of recombination of genes are increased during meiosis? Explain these events.

Match Column I with Column II.

S. No	Column I	S. No	Column II
(a)	Basophils	1.	6-8%
(b)	Lymphocytes	2.	60-65%
(c)	Neutrophils	3.	0.5-1.0%
(d)	Monocytes	4.	20-25%

Write a brief description on the characteristics of Monera kingdom.