Which of the following statements describes the hypothesis proposed to explain the regular arrangement of leaves around the stem?
A. Primordia are pre-programmed to grow in
a set arrangement.
B. Primordia are unable to communicate.
C. Chemical signals from developing leaf
primordia create regions preventing new
primordial growth.
D. Developing leaf primordia physically block
new primordial.
E. We do not currently have a hypothesis to
explain how these growth patterns occur.
C
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At the present time, animals are responsible for _____ percent of the pollination of
angiosperms.
a. 10 b. 50 c. 75 d. 90
If you observe a cell that contains organelles, then that cell is most likely a(n) prokaryote
__________________ Indicate whether the statement is true or false.
Filtration occurs in the region labeled____
a. 1 b. 2 only c. 3 only d. 4 e. 2 and 3
In populations where individuals with extreme values of a trait have the highest fitness, the average value of the trait may not change, but the amount of variance in the trait does increase over time. This set of circumstances is known as ________
[two words] Fill in the blank(s) with correct word