The cells within and on us that are not actually of us constitute the
A) human microbiome.
B) parasite family.
C) exome.
D) cytoskeleton.
A) human microbiome.
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Below is a high-magnification photomicrograph of an organism similar to one you observed in this exercise. Each rectangular “box” is a single cell. What normally visible organelle is absent from each cell that makes it “prokaryotic?”
What will be an ideal response?
The individual credited with first observing the cell nucleus was ____
a. Anton van Leeuwenhoek b. Robert Brown c. Matthias Schleiden d. Theodor Schwann e. Rudolf Virchow
In some cases, when an insect begins feeding on a leaf the plant responds by activating a signaling
pathway that results in the production of ____, which disrupt an insect's capacity to digest proteins.
a. gibberellins b. lipases c. chitinases d. protease inhibitors e. cytokinins
In humans, nitric oxide is an important gaseous neurotransmitter. Nitric oxide is synthesized by three isoforms of nitric oxide synthase (NOS). What would be a likely effect if a male were missing the gene that codes for one of the NOS isoforms?
A. He would be unable to produce all the liquid components of semen. B. He would have high levels of mutation within his mature sperm. C. He would have difficulty getting and/or sustaining an erection. D. He would have a low sperm count due to decreased spermatogenesis.