What units of light stimulate photoreceptor cells in the retina?
What will be an ideal response?What will be an ideal response?
photons
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A genetic condition in which body temperature becomes abnormally elevated is ________.
Fill in the blank(s) with the appropriate word(s).
The origin of the 46 chromosomes in a human zygote is
A) all from the egg. B) all from the sperm cell. C) half from DNA and half from RNA. D) half from the sperm and half from the egg.
The peritubular capillaries
a. supply nutrients and O2 to the tubular cells b. take up the substances that are reabsorbed by the tubules c. supply substances that are secreted by the tubules d. perform all of the above e. perform none of the above
The nuclear envelope consists primarily of
A. ribosomal subunits. B. messenger RNA. C. two phospholipid bilayers. D. a double helix of DNA.