The main reason certain seeds germinate when brought to the soil surface, when the soil is disturbed, might be because:
A. They need additional oxygen.
B. They are then more aware of their surroundings.
C. They require light to germinate.
D. They have water deprivation.
E. They are sensitive to the cold temperatures of the soil.
C. They require light to germinate.
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In human females, what process causes milk production?
A. Stimulation of the alveoli of the mammary glands by prolactin from the anterior pituitary gland. B. Stimulation of the alveoli of the mammary glands by oxytocin from the anterior pituitary gland. C. Stimulation of the alveoli of the mammary glands by prolactin from the posterior pituitary gland. D. Stimulation of the alveoli of the mammary glands by oxytocin from the posterior pituitary gland. E. Stimulation of the alveoli of the mammary glands by LH from the anterior pituitary gland.
Provides physical protection against abrasion, pathogens and chemical attack
A. Pseudostratified columnar B. Simple columnar C. Simple cuboidal D. Simple squamous E. Stratified squamous F. Transitional
In general, plant dermal tissues are found
A) at the outer surface of a plant. B) near the center of the plant stems and roots. C) lining the vascular tissue. D) throughout the plant body.
Point mutations can occur in any given cell type, but they mostly affect only that one cell and cells produced by it. What cell type, if mutated, would allow the mutation to be passed on to family members for generations?
A) skin cells B) glial cells, such as those that produce a myelin sheath C) white blood cells D) gametes, such as an egg or sperm