Match the following items with the correct phrases.
_______1. Membrane-bound organelles where photosynthesis occurs.
_______2. The sites of protein synthesis in procaryotic cells.
_______3. Considered a “packaging plant,” where proteins are packaged into membrane-bound vesicles.
_______4. Membrane-bound organelles where energy is produced by the Krebs cycle and electron transport chain.
_______5. Found in procaryotic cells as well as eucaryotic cells.
a. plastids
b. mitochondria
c. ribosomes
d. endoplasmic reticulum
e. golgi complex
1. A
2. C
3. E
4. B
5. C
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A zygote is a fertilized egg formed by an egg and a sperm. The zygote undergoes many mitotic events as it develops into a solid ball of cells (ie, blastomeres) called a blastula. What changes occur in this early cleavage?
A. During the initial stages of cleavage, there is a tremendous increase in the number and size of blastomeres. B. During the initial stages of cleavage, there is a tremendous decrease in the number and size of blastomeres. C. During the initial stages of cleavage, there is a tremendous increase in the number of cells coupled with a decrease in the size of the cells composing the developing organism. D. During the initial stages of cleavage, there is no increase in the number of cells of the developing organism, but the size of the cells increases.
Migration is a key evolution mechanism by which microevolution occurs
Indicate whether the statement is true or false
Which type of communication mechanism travels the best in water?
a. Sound b. Smell c. Taste d. Sight e. All of these choices travel equally as well.
All epithelial cells in the inner lining of the large intestine that are heterozygous for an APC mutation ____
a. are able to control cell division with the second copy of the APC gene b. become cancerous c. require additional mutations in downstream genes to become cancerous d. cause the transition from polyps into colon cancer e. can partially escape control of the cell cycle and lead to the formation of clusters of polyps