The thin horizontal arrows in the figure above show that the _____
A) warmer arterial blood can bypass the legs as needed, when the legs are too cold to function well
B) warmer venous blood transfers heat to the cooler arterial blood
C) warmer arterial blood transfers heat to the cooler venous blood
D) arterial blood is always cooler in the abdomen, compared to the temperature of the venous blood in the feet of the goose
E) goose's legs get progressively warmer as the blood moves away from the abdomen towards the feet
Answer: C
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Answer the following statements true (T) or false (F)
1. Studies by Avery, MacLeod, and McCarty with different strains of bacteria and those by Hershey and Chase with T2 bacteriophage determined that proteins are highly complex molecules that form the genetic material for bacteria and viruses. 2. A strand of DNA is composed of nucleotide bases, sulfate groups, and sugars. 3. When considering the complexity of genetic material, multiple genes are found within a chromosome. 4. If there is 28% adenine, then there must be 28% cytosine for the DNA composition of a particular organism. 5. DNA is a double helix structure whose strands are held together by hydrogen bonds with A to T and C to G base pairing.
The breast muscle of a wild duck is dark, while that of a domesticated chicken is white. The breast muscle in a wild duck consists predominately of
A. fast-twitch muscles with abundant capillaries and mitochondria. B. fast-twitch muscles with few capillaries or mitochondria. C. slow-twitch muscles with abundant capillaries and mitochondria. D. slow-twitch muscles with few capillaries or mitochondria. E. random-twitch muscles with few capillaries or mitochondria.
Movable bones are features of the sense organs associated with
a. sight. b. hearing. c. taste. d. smell. e. touch.
The major concerns regarding the effects of air pollution fall into the areas of smog, acid rain, destruction of the ozone layer, and
A) pesticides. B) sustainable development. C) global warming. D) chlorofluorocarbons. E) denitrification.