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Which one of the following statements is correct?

Germ layers are tissue layers in the embryos of all animals except sponges.
Germ layers include ectoderm, endoderm, and mesoderm.
Flatworms have three germ layers whereas cnidarians and ctenophores have two.
All of these are correct.
Additional Questions

The figure shows four animals (a), (b), (c) and (d). Select the correct answer with respect to a common characteristic of two of these animals.
(a) (b) (c) (d)

Answer

The cross section of the body of an invertebrate is given below. Identify the animal which has this body plan.
Cross section of the body of an invertebrate

Answer

Which one of the following statements is incorrect?

Answer

Which one of the following statements is stated incorrectly regarding cartilaginous fishes?

Answer

Which one of the following statements is incorrect?

Answer

Tachyglossus is a connecting link between

Answer

Which one of the following characteristics is NOT a shared by birds and mammals?

Answer

The scientific name of Asian tiger mosquito

Answer

Water-Vascular system is found in

Answer

Swarming generally occurs in

Answer
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