Testcrosses may be used to determine if two genes are linked
Indicate whether the statement is true or false
TRUE
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What is a uniform characteristic of deserts?
A. Low rainfall amounts B. Uniformly high temperatures C. Thick layers of topsoil D. Void of animal life E. Large leafy plants
Which one of the following is TRUE regarding enzymes?
A) Enzyme function is not affected by changes in temperature or pH. B) Enzymes slow the rate of chemical reactions in living systems. C) Enzymes are consumed in a chemical reaction, so an organism must constantly replace these enzymes. D) Each enzyme catalyzes one specific reaction or group of reactions. E) Enzymes convert products into reactants.
The diagram shows the rate of diffusion into a cell using carrier proteins. 
McGraw-Hill EducationThe rate of diffusion will increase as
A. pH rises. B. the number of glucose molecules decreases. C. temperature decreases. D. the number of glucose molecules increases.
The first organisms to release oxygen by photosynthesis were:a
gymnosperms. b. green sulfur bacteria. c. algae. d. flowering plants. e. cyanobacteria.