________ groups are groups in which all members are descendants of a common ancestor
Fill in the blank(s) with correct word
Monophyletic
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Cooking oil and gasoline (a hydrocarbon) are not amphipathic molecules because they _____
A) do not have a polar or charged region B) do not have a nonpolar region C) have hydrophobic and hydrophilic regions D) are highly reduced molecules
In the sliding filament model of muscle contraction, I bands contain
A) thick filaments. B) thin filaments. C) myosin. D) sacrcomeres. E) both thick and thin filaments.
The regulatory site in an allosteric enzyme is found within the catalytic site.
Answer the following statement true (T) or false (F)
Answer the following questions in reference to the five items listed below.
A. B. The normal sperm cell of species X carries 11 chromosomes. Following nondisjunction in the formation of secondary spermatocytes and their subsequent fertilization of normal ova, some of the zygotes will have 21 chromosomes, and the remainder will have how many chromosomes? C. How many chromosomes are present in each cell of the germ cell line for a tetraploid species whose diploid complement of chromosomes is 48? D. Following a gene duplication event involving only five loci, how many chromosomes will a human female have? E. How many chromosomes does each somatic cell have in a human male who has two X chromosomes? F. How many chromosomes are present in the somatic cells of a child born with Down syndrome (trisomy 21)?