Question

Sample paper of biology class 12

Answer 1

Answer:

Explanation:Advantage of cleistogamy is:

a. No dependence on pollination c. Vivipary

b. Higher genetic variability d. More vigorous offspring

2 RrYy is crossed with rryy. Give a technical term for this cross:

a. Monohybrid Cross c. Test Cross

b. Dihybrid cross d. Back cross

3 How many molecules are found in histone molecule?

a. 1 b. 2 c. 4 d. 8

4 The vas deferens receive duct from seminal vesicles and opens into urethra as:

a. Epididymis b. Ejaculatory duct c. Ureter d. Efferent  

ductile

5 Milky water in green coconut is:

a. Free nuclear liquid endosperm c. Liquid nucleus  

b. Liquid female gametophyte d. Liquid chalaza

6 In oocyte, secondary maturation occurs in:

a. Ovary b. Abdominal cavity c. Fallopian tube d.  

Ureter

7 The promoter and terminator site for transcription are located at:

a. 3’ and 5’ end of transcription unit respectively.

b. 5’ and 3’ end of transcription unit respectively.

c. 5’ end

d. 3’end