What is believed to be the origin of both mitochondrial and chloroplast organelles?
What will be an ideal response?
Ans: Both organelles are believed to have originated by endosymbiotic event (an endosymbiont is an organism that lives within the cell of another organism, and usually both organisms derive a benefit) whereby a eukaryotic cell captured a bacterium (an ?-purple bacterium in the case of the mitochondrion).
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What is an innate behavior that results in movement toward or away from a stimulus?
a. reflex b. kinesis c. habituation d. taxis
What role might clays have played in the formation of macromolecules before the evolution of cells?
What will be an ideal response?
Organisms that get energy from the remains or products of organisms are ____________________. Fill in the blank(s) with the appropriate word(s)
Unlike terrestrial plants, submerged aquatic plants lack
A) leaves. B) chlorophyll. C) stomata. D) stems.