A community with lots of plants and animals, that have a equal balance between them that is success of a community which can only be destroyed by a fire or human causes.
invasive species cost the United States more than $120 billion in damages every year.
Both the temperate grasslands and temperate forests experience <u>seasonal climatic changes </u>
Explanation:
Both the temperate grasslands and temperate forests experience experience all the four seasons - spring, summer, winter and fall.
These climatic changes can be observed throughout the year with summer being warm and dry and winter being very cold. The summer temperature averages around 21 degrees centigrade while the winter temperature can go down below freezing levels.
This extremely cold winter leads to shedding of leaves of deciduous trees found in the temperate forests. The grasses in the temperate grasslands also shed and die annually with the roots and new buds protected by the soil during the cold weather.
Answer:
1. First calculate the distance of the map for trace (eg) and spastic mutation (sps); Recombinant frequency:
vg + sps + vg sps + = 99 + 97 = 196
we are going to divide 196 by 650 (total descendants) = 0.3.
in the next step we are going to calculate the recombinant frequency 0.3 * 100 = 30 mu or cM or 30%
this shows that there is an association between vestige (eg) and spastic mutation (sps) since the recombinant frequency is less than 50%.
The squareness test is not valid because the combining frequency is far from 50%.
2. Results:
1. Genes are linked.
3. The test rejected the independent assortment law because it is not true that there is a 1: 1: 1: 1 relationship between descendants
All cells have cell membranes, and the membranes are flexible. So animal cells can have various shapes, but plant cells only have the shapes of their cell walls. That's nice for plants, because it gives them the ability to grow up and out, where they can get lots of sunlight for making their food.
