Because of their relative genetic similarity, a. domesticated ...

[gbarreiro]

Because of their relative genetic similarity,
 
  a. domesticated species of grasses are susceptible to disease, drought, and pests.
  b. several roots crops are no longer able to sustain populations.
  c. scientists are trying to prevent reestablishing genetic diversity in grasses and several root crops through limiting introduction of heterogeneous strains.
  d. domesticated species of grasses are better than domesticated species of fowl and animals.
  e. domesticated species of plants are never interspersed with different species of plants.

Question 2

By the year 1800, the Industrial Revolution was well under way and there were about __________persons per square mile; two centuries later there were __________persons per square mile.
 
  a. 250; 500
  b. 30; 10
  c. 7; 24
  d. 10; 1000
  e. 18; 105

[dantucker]

Answer to Question 1

a

Answer to Question 2

e

[gbarreiro]

TYSM

[kthug]

Excellent