Answer:
As John is testing the effect of temperature on the solubility of sugar in water. To test this, he will measure the amount of sugar dissolved at different temperature level.
Answer:
The correct answer will be- Keystone species
Explanation:
The structure of a community is largely determined by the number of species present in the community called species richness and the species diversity.
The species which can play an important role in determining the community could be of two types the foundation species and keystone species.
The species which directly influence the diversity of a community irrespective of their number and abundance is known as the keystone species.
In the given question since the question has discussed the species which disproportionately influence the diversity of the community is known as keystone species.
Thus, keystone species is the correct answer.
Answer:
In the mentioned case, the statement that people who exercise for an hour may have lower levels of cholesterol is a hypothesis, and the cholesterol levels in the experiment would be the dependent variable.
Explanation:
A hypothesis is a suggested statement, that is, based upon the previous information, and is used as an initiation point in a scientific investigation.
Any scientific experiments comprise two variables, that is, dependent and independent variables. The independent variable refers to the variable, which is controlled or modified in a scientific experiment in order to determine its influence on the dependent variable.
<span>The thickness of the tissue layer
that is in focus is called the focal plane. the plane through the focus perpendicular to the axis of a
mirror or lens. It is controlled by the exposure
angle. The focal plane thickness decreases as magnification increases. </span>
