Melanocytes ultimately arise from
A. the endoderm.
B. the mesoderm.
C. the ectoderm.
D. the notochord.
E. the neural tube.
C. the ectoderm.
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Alh 84001
a. is a meteorite that shows possible evidence for life evolving on Mars. b. is the compound used by Miller to begin his experiment to produce amino acids. c. is the amino acid produced in the Miller experiment. d. is the molecule that controls the reproduction of DNA within a cell. e. is the molecule that acts as DNA's messenger that assembles proteins from amino acids.
Acyclovir is a chemical analog of a DNA nucleoside that is used to treat people who are infected by
herpes simplex viruses (HSV). How does acyclovir work as a treatment without harming the patients?
What will be an ideal response?Answer the following statements true (T) or false (F)
1. The Calvin cycle produces ATP and NADPH. 2. When chlorophyll a absorbs light, electrons are "excited" and ejected from the chlorophyll a molecule. 3. For most lawn grasses to grow well in hot, dry weather, they must be watered so that their stomata will remain open for longer periods of time to let in O2. 4. C4 plants and CAM plants fix carbon twice during the photosynthetic reactions. 5. Aerobic respiration uses oxygen as its final electron acceptor at the end of the electron transport chain.
Honeybees convey information to other worker bees
in the hive about all EXCEPT the __________ of a food source. a. direction b. general location c. distance d. abundance e. angle relative to the sun