Based on what scientists have observed about all living things on Earth, what must be true of something found in space for it to be considered living?
A) It must have one or more organelles.
B) It must be composed of one or more cells.
C) It must be able to move from place to place.
D) It must contain a nucleus.
Ans: B) It must be composed of one or more cells.
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Gymnosperms that produce resin, form male and female cones, and consist of tracheidbased xylem are classified as:
A. conifers. B. ginkgos. C. cycads. D. gnetophytes.
The genetic code has more than one codon for some amino acids. This is an example of
A. evolution. B. stringency. C. redundancy. D. translation.
Which type of new screening test will be able to identify cancers based on the presence of specific genes associated with various types of cancer?
a) colonoscopy b) astronomics c) pap smear d) proteomics e) genomics
Number 1 in the figure is an example of:
a. recapitulation via hypermorphosis. c. paedomorphosis via progenesis. b. recapitulation via acceleration. d. paedomorphosis via neoteny.