Structural Organisation in Animals — BIOLOGY STD 11 Science — Question

What is kinetochore?

Write the scientific name of a member of Liliaceae, whose roots are used as blood purifiers.

What do you understand by biosynthetic phase of photosynthesis?

Decrease in estrogen hormone levels is a common factor in which disease?

Which bones are present in each half of the pectoral girdle?

Seeds lie dormant until they get a favourable circumstance. Which hormone is responsible for dormancy of seed?

What is the function of glutamate dehydrogenase in plants?

Name the opening of the gastrovascular cavity of cnidarians. Where is it situated?

After teaching cell division in the biology class, teacher asked the students to think and describe the role of mitosis in an adult, who has already attained maximum height. Read the above passage and answer the following questions.

1. What is growth?
2. Name atleast two other processes which involve cell division.
3. What value is expressed in the teacher's behaviour?

Give the technical term for the following:

1. The forewings/ mesothoracic wings.
2. The jointed, filamentous structure found in the tenth abdominal segment of both male and female cockroaches.