Climate is the average weather in an area over a long period of time
a. true
b. false
Answer: a. true
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One significant difference between anthropoids and other primates is the size of their:a
legs. b. arms. c. brains. d. spine. e. feet
Which free-living cells were the earliest contributors to the formation of Earth's oxidizing atmosphere?
a) chloroplasts b) mitochondria c) endosymbionts d) seaweeds e) cyanobacteria
How does the protozoan Trypanosoma evade detection by the immune system?
A) It produces a capsule which is composed of polysaccharides similar to those found in the host. B) It can change the surface antigens frequently, preventing the immune system from tracking it. C) It prevents phagosome-lysosome fusion. D) It can resist oxidation inside macrophages.
Crown gall disease in plants comes from exposure to the soil bacterium Agrobacterium tumefaciens. How is it that the tumors characteristic of the disease can persist when the bacteria are no longer found in the plant?
What will be an ideal response?