Answer:
im not sure what your questions is about it could be
1) mutation, gene flow, genetic drift, and natural selection
or
2)reproduction, heredity, variation in fitness or organisms, variation in individual characters among members of the population.
Explanation:
Cell walls, which are found in plant cells, maintain cell shape. Some animal cells dont need to maintain shape. Such as muscle cells, they are constantly moving.
Ecosystems can be large and are made of biomes. Some examples of ecosystems are deserts and forests.
Answer:
d. BB
Explanation: The only possible phenotype would be BB because if you draw a Punnett square you see that you get BB, BB, BB, and BB so that is the only posssible genotype.
<h3>
Answer: True</h3>
Healthy top soil is needed to grow crops, which in turn some of it becomes food. Erosion is the process in which top soil is carried away by the wind or rain water (depositing it into nearby lakes or streams). Without this top soil, farming becomes more difficult and crop yields likely decrease. In some cases, no crops can be grown at all. An extreme example of soil erosion, specifically wind-driven soil erosion, is the 1930s dust bowl during the Great Depression. This occurred due to over-farming and it led to massive dust storms. In turn, it caused many farmers to leave the area.