Question

True statements about the development of the frog and mouse embryos include which of the following?
I. Both the frog and the mouse embryos develop in an aqueous environment.
II. Both the frog and the mouse embryos depend on a large supply of yolk to sustain the developing embryo.
III. Both the frog and the mouse embryos develop a 4-chambered heart.

• A. I only
• B. III only
• C. I and II only
• D. II and III only

Answer 1

The correct option is A I only

Out of the options given, the only true statement about the development of the frog and mouse embryos is that both the frog and the mouse embryos develop in an aqueous environment.

As frog embryos do not have an amnion they do not depend on the supply of yolk for the development of the embryo. Also, frog embryos have a three-chambered heart, while mouse embryos have a four-chambered heart.

So, the correct answer is 'I only'.