Which one of the following is a major cause of female infertility?
1.Hormone-related ovulation problems
2.Oviduct blockage
3.Cervical problems
4.Varicocele
2
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A DNA codon reads GCC. Give the corresponding mRNA codon, tRNA anticodon, and amino acid
What will be an ideal response?
The wings of birds and insects share similar functions but evolved from different structures; therefore, these wings are said to be
A) homologous. B) biramous. C) uniramous. D) analogous. E) bipedal.
How is a nerve impulse usually transmitted across a synapse from a presynaptic to a postsynaptic cell?
a) via a direct connection b) via Na+ ions c) via a neurotransmitter d) via a spark e) via plasmodesmata
Class II MHC are found on
A) the skin. B) red blood cells. C) cytoplasmic membranes of nucleated cells. D) muscle cells. E) professional antigen-presenting cells.