Which cell structure is an important component in modern genetic engineering techniques?
A. mesosomes
B. capsules
C. ribosomes
D. inclusions
E. plasmids
Answer: E
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Cnidarians are
A. aquatic animals. B. Both land-dwelling animals and aquatic animals are correct. C. land-dwelling animals. D. arboreal animals. E. Both land-dwelling animals and arboreal animals are correct.
In nutrient-rich water, photosynthetic protists may
undergo population explosions known as __________. Fill in the blank(s) with the appropriate word(s).
The dyes fluorescein and rhodamine
A. are used to identify pathogens of chlamydiosis, Legionnaires' disease, and others. B. are observed using fluorescence microscopy. C. can be used to label antibodies in immunofluorescence tests. D. emit visible light in response to ultraviolet radiation. E. All of the choices are correct.
Labeling.
?
?
Figure 31.14
A. hair B. duct of sweat gland C. blood vessels D. smooth muscle E. sweat gland F. hair follicle G. sebaceous gland H. hypodermis I. dermis J. epidermis