What microscope uses a metal-and-diamond probe to produce a three-dimensional image?
a) Atomic force microscope
b) Darkfield microscope
c) Phase-contrast microscope
d) Transmission electron microscope
Ans: a) Atomic force microscope
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A virus that infects bacteria is called a ____
Fill in the blank with the appropriate word.
Burkitt's lymphoma is a cancer of the lymphatic system. The endemic variant, common to equatorial Africa, commonly affects children who are also affected by chronic malaria
A recent study found that individuals with AA hemoglobin were twice as likely to develop Burkitt's lymphoma as those with the AS genotype. We saw a similar benefit of certain genotypes in cases of sickle cell disease. Recall that individuals who are ?A?S, ?A?C, or ?A?E have a survival and reproductive advantage over individuals who are homozygous ?A?A (and therefore succumb more easily to malaria) and over those who are homozygous for the mutant alleles (and therefore suffer from hereditary anemia). Resistance to malaria and Burkitt's lymphoma are both an example of ________ advantage. Fill in the blank(s) with correct word
Which of the following homonid species demonstrated bipedalism but still spent time living in the trees?
A. Dryopithecus B. Australopithecus afarensis C. Ardipithecus ramidus D. Australopithecus africanus E. Homo habilis
Arabidopsis plants that have mutant AtSUC2 alleles accumulate sugar and starch in their mature leaves. What process might these plants be unable to carry out?
A. phloem loading B. abscission C. photosynthesis D. guttation