Which of the following is NOT a morphogen?
A. Activin
B. Noggin
C. proteins
D. Cadherin
E. protein produced by Spemann's organizer (dorsal lip of a gastrula)
D. Cadherin
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New genetic variation in a population is a critical aspect of microevolution
Indicate whether the statement is true or false
Because prokaryotes do not contain a nucleus, the process of gene regulation occurs in which of the following?
a. ribosome b. cell membrane c. pili d. cytoplasm
What is the process that can lead to photosynthetic population explosions?
a. Dead zones b. Algal bloom c. Eutrophication d. Water runoff
Which of the following statements correctly describes cis-trans isomers?
A) They have variations in arrangement around a double bond. B) They have an asymmetric carbon that makes them mirror images. C) They have the same chemical properties. D) They have different molecular formulas.