Seed plants
(a) have alternation of generations.
(b) are heterosporous.
(c) develop a seed coat.
(d) are all of the above.
(d) are all of the above.
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People with very light skin have ________.
A) more melanocytes than people with very dark skin. B) fewer melanocytes than people with very dark skin. C) about the same number of melanocytes as people with very dark skin. D) red melanocytes.
The hierarchical nature of cellular structure is accurately illustrated in which of the following lists of substances (from smallest to largest)?
A) nucleotides, chromosome, DNA, nucleus, cell B) cellulose, glucose, cell wall, cell C) nucleotides, nucleus, DNA, chromosome, cell D) nucleotides, DNA, chromosome, nucleus, cell E) protein, membrane, amino acids, chloroplast, cell
A single dominant gene that produces abnormal connective tissue causes Marfan syndrome. Individuals with the condition exhibit symptoms such as nearsightedness, long thin appendages, and a weak aorta. Marfan syndrome is an example of
A. polygenic inheritance. B. pleiotropy. C. multiple alleles. D. lack of dominance.
When the end product of a pathway inhibits catalysis of the first step of that pathway, this phenomenon is called ________.
A. feedback inhibition B. reversible covalent modification C. noncompetitive inhibition D. metabolic channeling