Why do FSH levels drop after ovulation?
What will be an ideal response?
After ovulation, the corpus luteum begins to produce estrogen and progesterone, which inhibits GnRH production by negative feedback, reducing the release of FSH.
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Which of the following is a type of reproductive
isolating mechanism? a. temporal isolation b. mechanical isolation c. behavioral isolation d. ecological isolation e. all of these
Proline is referred to as the "helix breaker" because
A) its only found in the L form, which is incompatible with helical protein structure. B) it lacks the hydrogen atom needed for hydrogen bonding. C) it lacks a charged functional groups for ionic bonding. D) it is hydrophobic. E) it has a polar functional group.
The number of cells in an average-sized adult human is on the order of 1014
Use this information, and the estimate that the length of DNA contained in each cell is 2 m, to do the following calculations (look up the necessary distances and show your working): A. Over how many miles would the total DNA from the average human stretch? B. How many times would the total DNA from the average human wrap around the planet Earth at the Equator? C. How many times would the total DNA from the average human stretch from Earth to the Sun and back? D. How many times would the total DNA from the average human stretch from the Earth to Pluto and back?
At least 40% of the world population lives within 100 km (60 miles) of a coastline.
Answer the following statement true (T) or false (F)