Single-celled eukaryotes that feed on other organisms and have a cell wall are (algae/fungi/protozoa)
What will be an ideal response?
fungi
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To determine the age of a woody twig, one counts the
(a) nodes. (b) leaf scars. (c) lenticels. (d) regions between sets of terminal bud scale scars.
Biosphere 2 was an attempt by scientists to build a completely closed ecosystem in Arizona. It failed
because of the
a. decreased level of oxygen through respiration by soil microorganisms. b. contamination of food by soil microorganisms. c. disease outbreak caused by soil microorganisms. d. increased level of carbon dioxide produced by photosynthetic microorganisms. e. inability of soil microorganisms to recycle nitrogen.
Which of the following is used to define a phenotypic characteristic resulting from the expression of two or more genes?
A. linked genes B. incomplete dominance C. pleiotropy D. polygenic inheritance
How is the cell cycle of Sulfolobus spp. similar to that of eukaryotes?
A. Sulfolobus has microtubules composed of a tubulin homolog that separate the chromosomes. B. A centrosome is apparent in Sulfolobus during G2. C. Sulfolobus demonstrates prophase, metaphase, anaphase, and telophase. D. The cytokinesis process in Sulfolobus is similar to the process in eukaryotes.