Why is it important to conduct scientific tests more than one time?
What will be an ideal response?
Answer: It is important because you could make a mistake the first time you test and then it would not be accurate. Also, you could get a different result from each test.
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Double fertilization refers to
(a) fusion of two sperm nuclei and two egg cells. (b) fusion of one sperm nucleus with two polar nuclei and fusion of another with the egg cell nucleus. (c) maturation of the ovary into a fruit. (d) none of the above.
A network of protein filaments called ____ lines and reinforces the inner surface of the nuclear envelope in animal
cells.
a. actins b. chromatins c. lamins d. tubulins e. lamellae
Among the following substances contaminating Aberdeen Proving Ground in Maryland, which is an organic compound
that damages the nervous system, liver, and lungs?
a. lead b. arsenic c. dimethyl chloride d. trichloroethylene e. mercury
The meninges are composed of:
a. bone and dura mater only. b. dura mater and arachnoid only. c. arachnoid and pia mater only. d. dura mater, pia mater, and arachnoid only. e. bone, dura mater, pia mater, and arachnoid.