Answer: D. Hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
Hypothesis A and B both are suggesting that caffeine intake is related to higher heart rate. But hypothesis B is proving it more certainly by suggesting the affects of caffeine intake on heart rate. As, heart rate of most people will be higher 30 minutes after they drink a cup of coffee is testifying the fact, that higher heart rate is related with caffeine intake.
Therefore, hypothesis B is more useful because it suggests a way to test the relationship between heart rate and caffeine intake.
B. The flower color in a population changes over time.
Answer:
the anserw is B
Explanation:
Becuse landfill conant garbeg and can overfill.
<span>The Human Genome Project had a very negative effect due to development
in technology and academic rivalry. With knowledge came bitter rivalry and with
technology came the tendency to become God. These angles greatly created
negative impact about this project. The experts tried to create human clones,
tissue engineering etc. The scientists
tried to analyze a person and get rid of any future disease that might attack
them. Some people feel this is good while others feel that it is like
distorting the natural process. </span>
Answer:
c
Explanation:
The very primitive and early microorganisms on the earth's surface were protobionts. Protobionts are cell-like microscopic structures, and they are made up of organic and inorganic molecules present in a lipid bilayer membrane. The layers of the lipid membranes were folded into bilayers and transformed into a bubble shape when placed in water. These membranes were selectively permeable and also observed shrinkage and swelling in osmotic conditions. Protobionts also possess the characteristics of reproduction.
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