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
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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
The appendicular skeleton is attached to what?
What will be an ideal response?
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
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.