The Y chromosome
A. is larger than the X chromosome.
B. contains more genes than the X chromosome.
C. is the same size as the X chromosome.
D. is smaller than the X chromosome.
E. is genetically identical to the X chromosome.
D. is smaller than the X chromosome.
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A series of techniques in which DNA fragments from an organism are linked to self-replicating vectors to create recombinant DNA molecules, which are then replicated in a host cell, is called ____________________
Fill in the blank(s) with correct word
7. Identify the largest distinction between the theory of spontaneous generation and the cell theory.
A. Spontaneous generation can be observed with the microscope, while cell theory is newer and has not yet been proven. B. Spontaneous generation is found in organisms that don't have cells, while cell theory happens in organisms that do have cells. C. Spontaneous generation only happens with animalcules and germs, while cell theory applies to other, more complex organisms. D. Spontaneous generation proposes life can form from available molecule components, while the cell theory explains how all cells are formed from preexisting cells. E. There is no distinct difference between the two theories.
During his trip on the Beagle, Darwin found that ________.
A. plants and animals living in temperate regions were most similar to each other, regardless of the continent on which they were found B. plants and animals were similar on every continent and in every type of region C. fossils found on a particular continent were clearly not related to the plants and animals living on that continent today D. plants and animals living on a continent seemed more closely related to each other than to plants and animals living in similar regions on other continents
Indeterminate cleavage takes place in ____ and is characterized by a pattern of development where the ultimate fate of
each cell is ____. a. deuterostomes; not fixed until late in the developmental process b. protostomes; not fixed until late in the developmental process c. deuterostomes; fixed early in the developmental process d. protostomes; fixed early in the developmental process e. coelomates; fixed early in the developmental process