Some amphibians:a
may exchange gases across their body surfaces.
b. all have fairly simple, book lungs.
c. all have gills and swim bladders, homologous to those found in fishes.
d. are characterized by having parabronchi across which most of the gas exchange occurs.
e. have a large oxygen demand that is met by using a countercurrent gas exchange mechanism
a
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Which existing reptile group is most closely related to birds?
a. crocodilians b. lizards c. snakes d. tuataras e. turtles
The place where pollination occurs is the ____
a. stigma b. microspore c. anther d. receptacle e. style
The term “biotech barnyards” commonly refers to
a. the production of human products by farm animals. b. the development of new species of farm animals. c. the increase of milk, egg, and wool production. d. ultramodern methods of rearing more animals on less feed. e. creation of transgenic animals that can produce more of their natural products.
Which statement about a blastodisc is FALSE?
a. It can be further divided into an upper epiblast and below that, the hypoblast. b. It results from meroblastic cleavage. c. It is found in isolecithal eggs. d. It is a small disc of cytoplasm at the animal pole. e. It is characteristic of cell division in bird eggs.