In multicelled species, spores germinate and give rise to filaments called __________. Fill in the blank(s) with the appropriate word(s)
hyphae
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The lineages Anura, Caudata, and Gymnophiona are all part of which of the following group?
a. Testudines b. Archosauromorpha c. Squamata d. Sphenodontia e. Amphibia
For natural selection to occur, adaptive traits must be inheritable. This means that change occurs at the level of DNA. Answer the following question with this in mind
a. How do new traits develop? b. How may the genetic changes contribute to evolution by natural selection? c. How can the degree of similarity in DNA or protein sequence be used to infer the degree of relatedness between species?
The accumulation of free oxygen in the
atmosphere a. was a result of the accumulation of a byproduct of a type of photosynthesis. b. prevented the further spontaneous generation of life. c. provided the opportunity to extract more energy through aerobic respiration. d. did not occur immediately after the earth was formed. e. did all of these.
Carriers and reservoirs are both considered
A. Contributors to period of acme in the disease B. Zoonoses C. Capable of transmitting infectious disease D. Opportunistic in the disease process E. Direct methods for disease transmission