You are given a sample of plant tissue and asked to identify the type of tissue and its location in the plant. Using your microscope, you notice two distinct layers of cells. One layer contains cells that are tightly compacted together while the other layer has loosely arranged cells. The cells in both layers contain many chloroplasts. Based on this information, you determine the tissue is
A. vascular tissue from a root.
B. vascular tissue from a leaf.
C. mesophyll tissue from a leaf.
D. ground tissue from a stem.
E. mesophyll tissue from a stem.
Answer: C
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The epithelial cells in the skin of an animal have 24 chromosomes. How many chromosomes are present in the gametes of this animal?
A. 6 B. 12 C. 24 D. 48
Meiosis in flowering plants gives rise to cells that are ____
a. haploid gametophytes b. diploid sporophytes c. sporophytes that can be haploid or diploid d. diploid gametophytes e. haploid sporophytes
Which vitamin is derived from sugar monomers?
a. vitamin D b. vitamin E c. vitamin C d. vitamin A e. vitamin B12
Organisms that can grow with or without oxygen present are
A) obligate aerobes. B) facultative anaerobes. C) aerotolerant anaerobes. D) obligate anaerobes. E) either facultative anaerobes or aerotolerant anaerobes.