Question

What protist is thought to most closely resemble the ancestor of animals? Ochoanoflagellate O plasmodial slime mold O dinoflagellate O rotifer O apicomplexan

Answer 1

Ans -1) The correct answer for this question is -

a) choanoflagellates

Explanation -

Protista is unicellular which contain ancestor of plant ,animal and also fungi.

1) choanoflagellates  is a freeliving unicellular protista which considered as closely resemble ancestor of animals.It is colonial and flagella containing protista

2) Green algae is considered ancestor of plant and

3 ) slime mould is considered as ancestor of fungi .

Conclusion - from above discussion it is clear that choanoflagellates is ancestor of animal hence correct option is - a)

-----------------------------------------------------------

Ans - 2) The correct answer for this question is -

a) Gastrula

Explanation -

Gastrula is the stage of embryonic development in which start the formation of germ layers.

In this stage 3 layer formed in human , ectoderm ,mesoderm ,and endoderm and this layer later formed whole body .

hence the correct answer for this question is - a) gastrula.

Fertilization is fusion of gamete to form zygote , after that cleavage occur and it divide , blastula is the stage formation of hollow sphere due to repeated cleavage and then gastrula start formation of germ layer.