Which kind of T cells regulate the immune response by producing stimulatory lymphokines?
A. cytotoxic T cells (TC)
B. suppressor T cells (TS)
C. helper T cells (TH)
D. memory T cells (TM)
Answer: C
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You discover a fungus that makes both sexual and asexual spores. The sexual spores are made in groups of eight within a structure that bursts open to release the spores. The structures containing sexual spores are found within a multicellular structure that is about five inches tall. Into which group should you classify this fungus?
a. Glomeromycota b. Basidiomycota c. Chytridiomycota d. Zygomycota e. Ascomycota
A horizontal stem modified to penetrate the substrate and anchor a plant is a ____
a. vascular system b. protonema c. sporangium d. rhizome e. shoot system
Gingivitis
A. is primarily caused by normal anaerobic biota. B. may involve archaeal species. C. involves the formation of calculus and plaque. D. involves a crevice in the gum along the tooth. E. All of the choices are correct.
Proteins that speed up reactions are known as
1.salts 2.buffers 3.monomers 4.polymers 5.enzymes