A circular molecule of DNA devoid of any histone proteins describes the chromosome of a (an):
A. protozoa
B. yeasts
C. insects
D. flowering plants
E. bacteria
E
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When molecules diffuse, they move ________
a. down their own concentration gradient unless there are other molecules also diffusing in the vicinity b. up their own concentration gradient unless there are other molecules also diffusing in the vicinity c. up their own concentration gradient without regard to the gradients of other molecules d. down their own concentration gradient without regard to the gradients of other molecules
While out on a trip to a remote location in South America, you discovered an organism on a beautiful tropical flower. You have no idea about the classification of this organism
What features or characteristics of the new organism should you look for to at least be able to determine the kingdom it belongs to?
An atom has 20 electrons and 20 neutrons. What is the mass of this atom?
A. 20 B. 10 C. 80 D. 40
In what organelle does photosynthesis take place in algae and plants?
A. chloroplast B. mitochondrion C. ribosome D. chlorophyll E. lysosome