The cell membrane of the red blood cell will allow water, oxygen, and carbon dioxide to pass through. Because other substances are blocked from entering, this membrane is called:
A. perforated
B. semi-permeable
C. non-conductive
D. permeable
B. semi-permeable
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Gymnosperms that produce resin, form male and female cones, and consist of tracheidbased xylem are classified as:
A. conifers. B. ginkgos. C. cycads. D. gnetophytes.
Which of these organisms most contributes to the global methane oxidation and greenhouse gas conversion?
A. Chlamydia trachomatis B. Bacteroides fragilis C. Treponema pallidum D. Acidimethylosilex fumarolicum
The photosynthetic systems of algae living in deeper water are adapted to absorb more of the light of which of the following colors?
A. yellow B. red-orange C. blue-green D. purple E. white
A woman has a child using intrauterine insemination. The woman is the child's
A) gestational mother only. B) genetic mother only. C) gestational and genetic mother. D) gestational and surrogate mother.