Typically, one one sperm fertilizes the oocyte
because
a. an acid solution is released that kills all
other sperm.
b. special organelles within the oocyte eject
more than one sperm.
c. changes occur to the protein coat that
prevent further penetration.
d. follicle cellular space is only wide enough
for one sperm.
e. usually only one sperm arrives at the
oocyte.
C
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Dense mineralized bone tissue that forms the walls of the shafts of long bones is known as:
A. condensed bone. B. spongy bone. C. compact bone. D. trabeculae.
Select that statement that reflects evidence that directly supports the endosymbiotic theory.
A. Lysosomes contain their own DNA in the form of plasmids. B. The electron transport system is located in the cell membrane in bacteria, while in eukaryotes it is located in the mitochondrial cristae. C. Enzymes for photosynthesis are found embedded in membranes of the Golgi apparatus. D. Glycolysis occurs in the cytoplasm of bacterial cells.
Cystic fibrosis primarily affects which organ?
a. brain b. heart c. muscle d. lungs e. bones
Match the structures with their appropriate functions:
A. Roots allow plants to obtain water and nutrients, while shoots allow plants to obtain gases and sunlight. B. Roots allow plants to obtain water, nutrients and glucose, while shoots allow plants to obtain sunlight. C. Roots allow plants to obtain glucose, while shoots allow plants to obtain sunlight and water. D. Roots allow plants to obtain carbon dioxide and water, while shoots allow plants to obtain nutrients and oxygen.