Which of the following is (are) essential for
cleavage during cell division in animal cells?
a. a contractile ring
b. Golgi body vesicles
c. ATP molecules
d. a contractile ring and Golgi body vesicles
e. a contractile ring and ATP molecules
E
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A high school student is carrying out a science project. She plants alfalfa seeds, and encloses an area planted with one set of alfalfa seeds within a box covered in red cellophane (which reflects light of red wavelengths)
She leaves another set of planted alfalfa seeds uncovered. What do you expect she'll find in these two alfalfa populations when her science project is over? A. Germination rates will be the same in both seed sets. B. The germination rate will be lower in the uncovered seed set. C. The germination rate will be higher in the uncovered seed set.
Ernest Rutherford's key experiment on alpha particle bombardment of gold foil was important to the development of
A. detection methods for protons. B. alpha particle emitters. C. gold as an element. D. the modern model for atomic structure. E. the concept that atoms have a homogenous distribution of protons throughout the atom.
The most likely identification of an anaerobic gram-negative bacilli that will fluoresce brick red or has a brown-to-black-pigment is:
a. nonpigmented Prevotella. b. Porphyromonas spp. c. B. fragilis group. d. Fusobacterium spp.
Which one of the following terms applies to the phylum Nematoda?
A. Parazoa B. diploblastic C. deuterostome D. pseudocoelomate