Which of the following statements about the F2
generation produced in the dihybrid cross is NOT
true?
a. All offspring with the same phenotype have the
same genotype.
b. All offspring with the same genotype possess the
same phenotype.
c. It is not possible to determine the genotype of
some individuals by their phenotype.
d. It is possible to tell the genotype of some
offspring by looking at their phenotypes.
e. Nine genotypes and four phenotypes are
produced.
Answer: a
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Answer the following statements true (T) or false (F)
1. ATP synthase is a good example of a molecular machine that is composed of various protein subunits and that has moving parts. 2. The proton motive force is key to chemiosis because the H+ electrochemical gradient is lower in the intermembrane space than inside the matrix. 3. If oxygen is present, pyruvate will be converted to acetyl CoA in the mitochondrial matrix. 4. When a molecule of NAD+ (nicontinamide adenine dinucleotide) gains a hydrogen atom, the molecule becomes reduced. 5. Proteins and fats may be used as energy sources to drive aerobic respiration.
Occupying Europe and western Asia from about 150,000 to 28,000 years ago, ____ had a heavier build, more
pronounced brow ridges and slightly larger brains than modern humans, and were culturally and technologically sophisticated.
a. Homo habilis b. Homo erectus c. Australopithecus africanus d. Australopithecus afarensis e. Homo neanderthalensis
Which event in inflammation aids in white blood cells migrating from the blood vessel to the site?
a. Arterioles widen. b. Blood flow produces heat in the area. c. Capillary permeability is increased. d. Complement is activated. e. Phagocytes engulf complement coated bacteria.
Some species of Anopheles mosquito live in brackish water, some in running fresh water, and others in stagnant water. What type of reproductive barrier is most obviously separating these different species?
A) habitat isolation B) temporal isolation C) behavioral isolation D) gametic isolation E) postzygotic isolation