Bacterial flagella are composed of three parts: the ________ body, which is embedded in the cell, the hook, and the ________, which is the longest part of the flagellum.
What will be an ideal response?
basal; filament
basal, filament
basal filament
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The organ system that produces and releases eggs and sperm.
A) Muscular
G) Respiratory
B) Reproductive
H) Skeletal
C) Digestive
I) Nervous
D) Cardiovascular
J) Endocrine
E) Integumentary
K) Lymphatic
F) Urinary
The nitrogenous base found in DNA but not in RNA is
a. adenine. b. cytosine. c. guanine. d. uracil. e. thymine.
Many of the color varieties of summer squash are determined by several interacting loci: AA or Aa gives white, aaBB or aaBb gives yellow, and aabb produces green. Assume that two fully heterozygous plants are crossed. Give the phenotypes (with
frequencies) of the offspring. A) 12 white : 3 yellow : 1 green B) 3 white : 9 yellow : 4 green C) 4 white :9 yellow : 3 green D) 12 white : 1 yellow : 3 green E) 9 white : 3 yellow : 4 green
What pattern of cleavage is characteristic of mammals?
A. Holoblastic cleavage with eggs containing very little yolk, but with the inner cell mass distributed uniformly B. Some yolk, and cleavage resulting in vegetal and animal poles C. Holoblastic cleavage with eggs containing little or no yolk D. Holoblastic cleavage with eggs containing very little yolk, but with the inner cell mass concentrated at one pole E. Meroblastic cleavage with eggs containing almost entirely yolk