Answer:
Students who take a PE class and who will be eating sugary snacks before PE.
Explanation:
The control variable (or control group) is an experimental element which is constant or unchanged throughout the course of the experiment.
The option "students who take PE class and who will be eating sugary snacks before PE" will remain unchanged and constant because the whole point of the experiment is to see the effects on students performance in PE after eating sugary snacks.
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Answer:
The effects of weathering disintegrate and alter mineral and rocks near or at the earth's surface. This shapes the earth's surface through such processes as wind and rain erosion or cracks caused by freezing and thawing. Each process has a distinct effect on rocks and minerals.
Roots and leaves
The major driving force of water uptake in a large tree is transpiration.Transpiration is the process by which plants absorb water through the roots and release it as water vapor through the pores in their leaves. Once this water evaporates, a negative water vapor pressure is created or develops in the surrounding cells of the leaf. when this happens, water is pulled into the leaf from the vascular system, the xylem, to replace the water that has been transpired from the leaf.This pulling of water, or tension, that occurs in the leaf, will extend through the rest of the xylem column of the tree right into the xylem of the roots as result of the cohesive force holding the water molecules along the sides of the xylem tubing.The xylem is a continuous water column extending from the roots to the leaves.<span>Finally, the negative water pressure that occurs even to the roots will result in an increase of water uptake from the soil.</span>
Answer:
The correct matches are given as follows:
a. Amylase
- Starch
b. Pepsin
- Protein
c. Lipase- fats
Explanation:
The digestion can be defined as the breaking down of the complex compounds of food into simpler compounds for their better absorption. There are various enzyme that help in the process of digestion. Amylase, pepsin, and lipase are enzymes. The amylase is an enzyme responsible for breakdown of starch. The pepsin is responsible for the breakdown of protein into amino acids. The lipase is responsible for breakdown of fats.
<span>B. HEMOGLOBIN. In sickle cell anemia, </span>the hemoglobin is mutated or abnormal and it gives the red blood cells a crescent shape. This abnormal hemoglobin is referred to as hemoglobin S.
