The answer is option A.
The Student identifies the test tube
that stops bubbling first contains the catalyst.
Because Catalyst is a substance which
increases the rate of reaction, and the reaction shows that when a product is
obtained bubbles formed.
<span>When the student added X, Y and Z to the
test tubes. The one which is a catalyst fastened the reaction.</span>
Answer:
Control group
Explanation:
A control group is<em> a group of individuals in an experiment where the independent variable being tested (the exposition to cigarette smoke in this case) can't influence the results.</em> This control group will be then compared to the experimental group (exposed to the smoke) to see the effect of the variable evaluated.
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The <u>Tunica Media</u> is mostly made up of smooth muscle tissue; generally the largest layer in arteries, the vessels most responsible for maintaining blood circulation and blood pressure.
Explanation:
The niche of the plant is the role of the organism in the ecosystem. A plant's niche is essentially what the plant does in the environment.
- It entails the interaction of the plant with biotic factors of the ecosystem such as other plants and the animals.
- It also include the interaction of the plant with the abiotic factors in the ecosystem such as the soll, air, water e.t.c
Learn more:
Niche brainly.com/question/2321688
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