. Indicate whether the following statements are true T or false F


(a) Oviparous animals give birth to young ones. ()

(b) Each sperm is a single cell. ()

(c) External fertilization takes place in frogs. ()

(d) A new human individual develops from a cell called a gamete. ()

(e) Egg laid after fertilization is made up of a single cell. ()

(f) Amoeba reproduces by budding. ()

(g) Fertilization is necessary even in asexual reproduction. ()

(h) Binary fission is a method of asexual reproduction. ()

(i) A zygote is formed as a result of fertilization. ()

(j) An embryo is made up of a single cell. ( )

 

Best Answer

Explanation- 

(a)Oviparous animals give birth to young ones- False 

Oviparous are those animals that lay eggs and do not show embryonic development within the mother. 

(b)Each sperm is a single cell- True 

Sperm is a male gamete and it is formed after the cell division process (meiosis), each sperm is a single cell.

(c )External fertilization takes place in a frog- True 

The female frog releases its egg outside in the water and then the male frog releases its sperm outside in the water, then fertilization

takes place in the water. Hence, fertilization is outside the body. 

(d) A new human individual develops from a cell called gamete- False 

A gamete is a single cell when male gamete sperm and female gamete egg is fused to form a zygote, then the zygote develops into an embryo to form a completely new individual. 

(e) Egg laid after fertilization is made up of a single cell- True

The fertilized egg is only a single cell

(f) Amoeba reproduces by budding- False

Amoeba reproduces by binary fission in normal conditions, under unfavorable conditions amoeba reproduce through multiple fission. 

(g) Fertilization is necessary even in asexual reproduction- False 

In asexual reproduction, only a single cell or single individual is needed, so fertilization is not necessary for asexual reproduction. 

(h) Binary fission is a method of asexual reproduction- True

In binary fission only a single cell is involved so, binary fission is a type of asexual reproduction seen in yeast.  (i) A zygote is formed as a result of fertilization-True 

A gamete is a single cell when male gamete sperm and female gamete egg is fused together it forms a zygote. 

(j) An embryo is made up of a single cell- False 

The embryo is formed when the zygote undergoes multiple divisions, so the embryo is made up of multiple cells. 

Final Answer- 

(a)Oviparous animals give birth to young ones-False 

(b)Each sperm is a single cell- True 

(c )External fertilization takes place in a frog- True 

(d) A new human individual develops from a cell called gamete-False 

(e) Egg laid after fertilization is made up of a single cell- True

(f) Amoeba reproduces by budding-False

(g) Fertilization is necessary even in asexual reproduction- False 

(h) Binary fission is a method of asexual reproduction- True

(i) A zygote is formed as a result of fertilization-True 

(j) An embryo is made up of a single cell- False 

 

 

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