Answer: Directional selection occurs when individuals with traits on one side of the mean in their population survive better or reproduce more than those on the other. ... Directional selection does the “heavy lifting” of evolution by tending to move the trait mean toward the optimum for the environment.
Answer:
Drinking alcohol in the first three months of pregnancy can cause the baby to have abnormal facial features. Growth and central nervous system problems (e.g., low birthweight, behavioral problems) can occur from drinking alcohol anytime during pregnancy.
Explanation:
Answer: The role an organism plays in its community is its niche. I Know this is right cause I took this test last year in 11 grade.
If the substances preform the same in a variety of test, the they are the same. This is because they should always be tested in multiple categorys to see if they are the same or at least alike.
B. Oases are sourced by springs and are regions where groundwater intersects the land surface.
Explanation:
The only true statement is that oases are sourced by springs and regions where ground water intersects the land surface.
- Oases are water bodies found in desert and arid areas.
- They are usually surrounded by fertile patches of soil.
- Oases forms when the land surface intersects the water table.
- They can also be fed by temporary surface water from nearby rivers.
Fossil remains have suggested that the region of the Sahara desert was once a lush green tropical region.
In present day, it is a desert with huge underground water reserves in aquifers.
Learn more:
Deserts brainly.com/question/6685795
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