Locomotion and Movement — BIOLOGY STD 11 Science — Question

Define epithelial tissues.

Explain bilateral symmetry flower.

1. Name the specialised cells where nitrogen fixation occurs in the trichomes of certain cyanobacteria.
2. Give two examples of cyanobacteria where such cells are present.

Why does green algae looks green?

In which medium are the hydrolytic enzymes of lysosomes most active?

Oxidation of chlorophyll occurs in the presence of oxygen. So what is it called?

Mention the step of citric acid cycle, which is not mediated by dehydrogenase enzyme.

1. How many ovarioles are present in an ovary of a cockroach?
2. Where are spermathecae present in a cockroach?

The second meiotic division is similar to 1 mitosis as it results in the separation of the sister chromatids. However, it also differs from mitosis. Explain how?

Your friend has gone for blood test and his haemoglobin count is 17gm per 100mL. What should he do?

1. No need to worry.
2. Take rest.
3. Take rest and prescribed medicines.
4. Take rest and lots of leafy vegetables.