answer:
because it benefits the soil. the long alfalfa stand life also gives the soil a chance to rest from frequent field crop rotations, helps provide nitrogen for subsequent crops, and improves soil tilth. this helps prevent pesticide and sediment movement to natural waterways.
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Answer:
PP = 25%
Pp = 50%
pp = 25%
Explanation:
Using punnett square, we can predict the percentage probability of genotypes.
P p
P PP Pp
p Pp pp
In this cross we have,
PP = 1/4 = 25%
Pp = 2/4 = 50%
pp = 1/4 = 25%
We have ratio,
1 : 2 : 1
Answer:
the formation of new and distinct species in the course of evolution.
Answer:
new species often appear at about the same time.
Explanation:
A biotic crisis or a mass extinction crisis is a rapid and widespread decrease in biodiversity. There is a clear change after the mass extinction, in the diversity and of multicellular organisms.
