In December, a city in the Southern Hemisphere has warm weather all month long. What causes this to happen?
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The city experiences fewer hours of daylight.
The city is experiencing a winter solstice.
There is a high concentration of the Sun's rays in that region.
The Sun reaches its highest point in the sky during this month.

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.

What is the function of the nucleus in the euglena cells you observed?

Which rate indicates the number of children that would be born per women if she were to live to the end of her child-bearing years