Stages of Drosophila development are listed here. Which of the following choices lists these stages of Drosophila development in the correct order?
a - the three germ cell layers form
b - metamorphosis
c - the larva hatches
d - the syncytial blastoderm forms
e - the body is divided into segments
f - the pupa forms
g - the cellular blastoderm forms
A. D,G,A,E,C,F,B
B. G,D,E,A,C,F,B
C. D,G,A,E,F,C,B
D. D,G,A,E,B,C,F
E. G,D,A,E,F,C,B
A. D,G,A,E,C,F,B
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What is the main method of dispersal of fungal spores over long distances? a. Carried on water currents
b. Attached to the body parts of insects. c. Spread by human travel across the globe. d. Attached to the legs of birds. e. Blown by the air currents.
Which of the following sequences is correct?
a. receptors >>> sensory neurons >>> motor neurons >>> interneurons b. sensory neurons >>> receptors >>> motor neurons c. motor neurons >>> integrators >>> sensory neurons d. receptors >>> motor neurons >>> interneurons >>> sensory neurons e. sensory neurons >>> interneurons >>> motor neurons
Neurospora is an ideal organism to study the effects of genetic mutations because of several reasons. What is one of
these? a. Neurospora is a small mammal. b. Neurospora grows as a diploid organism. c. Neurospora requires a medium supplemented with only a few nutrients that it cannot manufacture on its own. d. Neurospora mutant strains that cannot make a particular amino acid can still grow if that amino acid is added to the growth medium. e. Neurospora contains homologous chromosomes that are easily viewed with a light microscope
A multigene family is composed of _____
A) multiple genes whose products must be coordinately expressed B) genes whose sequences are very similar and that probably arose by duplication C) a gene whose exons can be spliced in a number of different ways D) a highly conserved gene found in a number of different species