1. In the list of organisms given below, those that reproduce by the asexual method are ?

Dog, Yeast, Amoeba

Banana, Amoeba

Dog, and Amoeba

Banana, Yeast, Amoeba

Answer: Banana, Yeast, Amoeba

Explanation:

A sexual reproduction take place without the process of gamete formation and only one parent is needed, examples include Amoeba reproduce by binary fission (division of cell into two similar cells). Yeast, reproduce by budding (small bud develops from body wall of parent that separate and grow further). Banana, reproduce by vegetative propagation (vegetative parts of a plant such as root, stem etc. can produce new plants) In dog, sexual reproduction take place (i.e. it involves two sexes-male and female whose gametes fuse constituting sexual reproduction).


2. The place where fertilization take place in the human body is ?

vagina

Ovary

Oviduct

Uterus

Answer: Oviduct

Explanation:


3. The fertilisation of human egg by the sperm takes place in ?

vagina

ovary

oviduct

uterus

Answer: oviduct

Explanation:


4. Which of the following is a primary sex organ in a mammal ?

Mammaiy glands

Uterus

Ovary

Vagina

Answer: Ovary

Explanation:


5. A feature of reproduction that is common to Amoeba, Yeast and Spirogyra is that ?

they are all multicellular

they reproduce asexually

they are all unicellular

they reproduce only sexually

Answer: they reproduce asexually

Explanation:


6. Many unicellular organisms reproduce by the process of ?

ovulation

non-disjunction

fission

regeneration

Answer: fission

Explanation:


7. Choose the correct statement ?

The cell which is formed by the fusion of male and female gametes is called zygote.

The fusion of a male gamete with a female gamete to form a zygote during the sexual reproduction is called fertilization.

All the multicellular animals start their life from a single cell called zygote through sexual reproduction.

All the above

Answer: All the above

Explanation:

all the statements are correct. Hence, answer will be option [D]


8. The seed that contains the future plant is called the ?

germ cells

embryo

seed coat

cotyledons

Answer: embryo

Explanation:


9. The ability of an organism to develop whole body from a broken piece or fragment is called ?

multiple fission

regeneration

budding

binary fission

Answer: regeneration

Explanation:


10. During adolescence, several changes occur in the human body. Mark one change associated with sexual maturation in boys ?

Cracking of voice

Weight gain

Increase in height

Loss of milk teeth

Answer: Cracking of voice

Explanation: