Which of the following is at the root cause for all cancers?
A) a breakdown of the cell division process B) obesity
C) the normal cell division process D) antibiotic resistance
Answer: A
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In seed plants the embryo develops inside the seed, which allows for:
A. less dispersal of the sporophyte generation. B. the development of dormancy. C. the dominance of the gametophyte generation. D. nutrient reserves for the developing embryo. E. greater protection for the developing embryo. F. the development of dormancy as well as nutrient reserves and greater protection for the developing embryo.
Nicotine and morphine are classified as
a. alkaloids. b. cyanogens. c. plant pigments. d. terpenoids
A mutation in the IGF2 gene in pigs results in a three-fold increase in the transcriptional activity of this gene in muscle
cells; therefore, these pigs are leaner and more muscular. Because this mutation is located in the noncoding region of the IGF2 gene, we can infer that:a. the IGF2 gene is a prokaryotic gene. b. the IGF2 gene is present only in muscle cells, but not in adipose (fat) cells. c. the mutation changes the amino acid sequence of the IGF2 protein. d. the mutation alters the regulatory region of the IGF2 gene. e. less IGF2 protein is synthesized in the muscle cells of these pig
An embryo with meroblastic cleavage, extraembryonic membranes, and a primitive streak must be that of _____
A) an insect B) an amphibian C) a bird D) a sea urchin