Diploblastic animals, such as cnidarians and ____, have only two germ layers, ectoderm and ____

a. sponges; ectoderm
b. sponges; mesoderm
c. ctenophores; mesoderm
d. ctenophores; endoderm
e. ctenophores; metaderm


d

Biology & Microbiology

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The integration of body functions is controlled by the ____

a. respiratory system only b. nervous system only c. endocrine system only d. immune system only e. nervous system and the endocrine system

Biology & Microbiology

The appendicular skeleton is attached to what?

What will be an ideal response?

Biology & Microbiology

Suppose a scientist is interested in studying DNA regulatory elements. What should she prepare first?

a. cDNA library b. genomic library c. transgenic mouse d. Northern blot e. DNA chip

Biology & Microbiology

Robert H. Whittaker, in a study of plant distributions in Great Smoky Mountains National Park, provided considerable support for:

A) the concept of open communities. B) the concept of closed communities. C) a novel concept that transcended the concepts of both closed and open communities.

Biology & Microbiology