Sexual Reproduction

Q.

How does the creation of variation in a species promote survival?

Q.

In humans, non-motile and food storing germ cells is ________ and the motile germ cell is _________.

1. Ovule, anther

2. Ovum, sperm

3. Sperm, ovum

4. Ovule, sperm

Q.

Fertilization is the process of

1. Transfer of male gamete to female gamete

2. Fusion of nuclei of male and female gamete

3. Adhesion of male and female reproductive organs

4. The formation of gametes by a reproductive organ

Q.

The human egg has a head, middle piece and tail.

1. True
2. False

Q.

The accurate amount of DNA transfer takes place to offsprings when two parents contribute their DNA in sexual reproduction. What is the mechanism/process responsible for this?

1. by meiosis

2. by cytokinesis

3. by mitosis

4. by cellular metabolism

Q.

Which type of cell division is prominent in the reproductive cells of plants and animals?

1. Multiple fission

2. Mitosis

3. Meiosis

4. Binary Fission

Q. Write any two differences between asexual and sexual modes of reproduction.

Q. Describe the method of sexual reproduction in human beings

Q. In basidiocarp of Agaricus campestris, each gill has ______________.

1. Two zones of monokaryotic hyphae
2. Three zones of dikaryotic hyphae
3. Three zones of monokaryotic and diploid hyphae
4. Two zones of dikaryotic and diploid huphae

Q. Physiological anisogamous sexual reproduction is found in

1. Mucor
2. Selaginella
3. Pinus
4. Spirogyra

Q. How long does it take for a grub to become a complete ant?

Q. Which of the following are transferred from parents to offspring because of which they look like their parents?

1. Chromosomes
2. Nucleolus
3. Mitochondria
4. Ribosomes

Q. Which of the following organism reproduces sexually?

1. Amoeba
2. Euglena
3. Goat
4. Spirogyra

Q. In the question below are given two sentences numbered I and II.In these sentences, two homonyms are given in italics type, which may be either mis-spelt or inappropriate in the context of the sentence. Read both the sentences carefully and decide on their correctness on the basis of the italicized words.
I. He is respected for his peity.
II. Have pity for the poor.

1. only sentence I is correct
2. only sentence II is correct
3. both the sentences I and II are correct
4. I as well as II are incorrect, but both could be made correct by interchanging the italicized words
5. If neither I nor II is correct, and the sentence could not be made correct by interchanging the italicized words

Q. Chances of inheritable and evolutionary changes are more in such species which reproduce by

1. Parthenogenesis
2. Fission
3. Sexual reproduction
4. All of the above