Which of the following is an archaean that has been identified in the human gut?
A) Escherichia coli
B) Enterobacter aerogenes
C) Bifidobacterium longum
D) Methanobrevibacter smithii
E) Caenorhabditis elegans
D
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Why are most infants with phenylketonuria usually healthy at birth?
a. The defect causing the condition has usually been repaired by that time. b. The mother breaks down phenylalanine for both herself and her fetus. c. The infant can produce sufficient quantities of the enzymes needed by birth. d. Phenylalanine can be completely excreted in infants. e. Phenylalanine is completely metabolized in infants
__________ results in an early embryo that has two or three primary tissue layers. Fill in the blank(s) with the appropriate word(s)
During meiosis in a reciprocal translocation heterozygote, what are the three ways that chromosomes may segregate at anaphase I, and what are the consequences for the resulting gametes?
What will be an ideal response?
What are the principal structural components of cilia and flagella?
a. intermediate filaments b. myosin microfilaments c. actin microfilaments d. microtubules