Describe how maternal effect genes and segmentation genes work together in the early embryonic stages of
Drosophila. What will be an ideal response?
Concepts to Consider: Maternal effect genes determine anterior-posterior and dorso-ventral
polarity of the embryo by producing gradients of certain chemicals called morphogens.
Segmentation genes then respond to the concentration of morphogens to produce
segmentation
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All of the following are stages of aerobic cellular respiration EXCEPT
a. glycolysis. b. the citric acid cycle. c. the electron transport chain. d. acetyl CoA
Which phylum is a member of the Radiata clade?
a. Nemertea b. Porifera c. Rotifera d. Ctenophora e. Echinodermata
Which of the following is a somatosense?
a. temperature b. pain c. vibration d. proprioception
Which characteristic of a population is a convenient way to express the rate of change within a
population? a. size b. growth c. density d. carrying capacity e. age