A(n) ________ is an abnormal mass of tissue that is surrounded by a capsule of connective tissue and usually remains at the site where it forms
Fill in the blank(s) with correct word
benign tumor
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Which series of letters lists the first four steps of the scientific method (see question 5) in the correct order?
(a) a, b, c, d. (b) a, b, d, c. (c) c, a, b, d. (d) d, c, a, b.
________ and ________ are the two kinds of sugars found in bacterial cell walls.
Fill in the blank(s) with the appropriate word(s).
Which statement describes a home heating and cooling system that functions in a homeostatic way?
A. The temperature always stays the same. B. The heater never comes on. C. The heater is on at a constant rate. D. The thermostat keeps the temperature within a narrow range.
A potential source of nitrogen in a sandy soil environment might be the bacterium, Rhizobium, which inhabits the root nodules of leguminous plants. Which of these statements is true, and should prevent Rhizobium or other root-inhabiting nitrogen-fixers from contributing nitrogen to the soil in this experiment?
A) Mosses have no roots. B) Moss gametophytes lack stomata. C) Mosses evolved before there were substantial amounts of nitrogen in Earth?s atmosphere. D) Among land plants, only legumes are known to establish symbiotic relationships with members of other kingdoms.