The number of individuals in a specified
portion of habitat is the population's
a. distribution.
b. carrying capacity.
c. density.
d. size.
e. birth rate
C
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Answer the following statements true (T) or false (F)
1. When Ron Evans generated transgenic mice in which the gene PPAR-delta was constitutively active (i.e., always expressed), he found that these mice showed a shift from fast glycolytic fibers to slow oxidative fibers. Based on this, faster sprint speeds in the transgenic mice would also be predicted. 2. The fact that a quarterback can throw a football at approximately 50 miles per hour means that the muscles powering this throw must also be shortening at 50 miles per hour. 3. Walking or running are more energetically expensive forms of locomotion than either swimming or flying. 4. The only chyme molecule that is absorbed in significant amounts by the stomach is water.
As a direct result of cleavage, ________
a. a zygote becomes a blastula b. ectoderm differentiates from endoderm c. a blastula becomes a blastocoel d. a blastula becomes a gastrula
The neuron transport proteins that maintain the resting membrane potential and restore ion gradients following an action p
otential are ____. a. sodium-phosphorus passive transporters b. sodium-potassium pumps c. sodium-chlorine gated channels d. phosphorus-calcium pumps e. phosphorus-chlorine gated channels
In certain Latin American countries during periods of political volatility, children were removed from their families and their parents were executed (then referred to as being "disappeared")
The methods with the best chance of reuniting those children with members of their extended family have used mtDNA matching. Why and how? A) Remains of the children's mothers can be used to match their mtDNA with that of their children. B) Children's mitochondria will have genomes that are 1/4 identical to each of their grandparents. C) Children's mitochondria will have genomes that are 1/2 identical to their maternal grandparents. D) Children's mitochondria will have genomes that are identical to those of their maternal grandmothers. E) Children's mtDNA will be identical to those of their first cousins.