The answer is 1. As seen in the data given, we can conclude that fat contains twice as many calories as an ounce of protein have. Calories contained in an ounce of fat is about 271 and the amount of calories protein has in an ounce is 147.

1

The answer is 4. In order to know the amount of chlorophyll production, the experiment must have the same species of plants in order to prevent viariation and the plant must be exposed to different light intensities in order to properly quantify the amount of chlorophyll produced.

4

The answer is 3. Control variables are not merely the target of the experiment but is used as a variable to compare the experimental group. This is used in order to make a reference for the experimental group.

3

The answer is 1. From the passage, we can formulate a hypothesis that light intensity affects the growth of microscopic plants. It supports the hypothesis or concludes that the growth of the microscopic plants were based on how exposed they are with light.

1

The answer is 1. We could question that four deer is not enough to conclude that most of the deer in general would prefer apples over corn for meals.

1

The answer is 1. In order to accept a conclusion, it must agree or disagree with the experiment as well as the hypothesis. The conclusion must be based on the experimental design done and must have a consistent basis.

1

The answer is C. For a conclusion to be drawn upon, we needed variables to be compared to, and reach an outcome, or results based on reasoning, and experimentation. In this case, the variables used were wether the beans will grow faster if we fertilized the, at regular interval, compared to being fertilized once before you plant them. After doing a series of analysis, and experimentation, we have reached a conclusion that the former showed significant growth than the latter. This form of statement is an example of drawing a conclusion from the results.

C

The answer is D. Hypotheses are commonly used in scientific research wherein a certain belief or idea is formed to give a researcher further reason to study or dig up information as well as do further testing about that theory.

D

The answer is A. Testing a hypothesis can be achieved by doing tests or experiments in order to draw a conclusion that would either agree or disagree with the drawn hypothesis.

A

The answer is B. Results are the outcome of the performed experiment. It either agrees or disagrees with the formed hypothesis.

B

The answer is 2. As seen in the data given, we can conclude that being exposed to secondhand smoke could slow the growth of the fetus. This is proved by the experiment done wherein for those mothers which were not exposed to smoke had more weight in their babies compared to those that were exposed.

2

The answer 1. This is the answer because we can conclude that based on the graph seen, the higher the oxygen amount, the greater the relative ATP to be produced.

1

The answer is 3. As proved by the data given, photosynthetic organisms wer found to respond to different changing light levels. At full light, photosynthetic plants can go as deep as 150cm and still receive the needed sunlight and as shallow as 10cm for no light.

3

If the new drug is applied to the rats, then the production of BDNF in the brain will be enhanced thereby improving memory and maintaining nerve cell death.

Control variables are not merely the target of the experiment but are used as a variable to compare the experimental group. This is used in order to make a reference for the experimental group. The control group for this experiment will be given a drug with a placebo effect.

Two factors that must be kept the same would be the environment of the rats and the same species of rats used. This is important to prevent the variation in results.

The dependent variable in this experiment is the rats in which was exposed to the disease. A dependent variable is defined as the variable that is affected by the independent variable. The dependent variable in this experiment would be the production of BDNF with respect to the drug given.

A vaccine contains an antigen that triggers a primary immune response to counter exposure to an infectious agent or pathogen.

The reason why there is a placebo group is to effectively perform the experiment with regards to the actual drug to be given. Control variables are not merely the target of the experiment but are used as a variable to compare the experimental group. This is used in order to make a reference for the experimental group.

Scientists have used monkeys as the subject for this experiment because monkeys are said to be closely related or alike to humans. Monkeys are also easily trained and cooperative.

To verify results, certain tests are done. Like culturing or testing the presence or absence of the disease by using modern technology that can be a great help for the experiment.

In this experiment, the identification of the diffusion of starch through the membrane by using a dialysis tubing method is done. The dialysis membrane is a semi-permeable membrane wherein it filters large molecules so that only small molecules are diffused.

To interpret the results, tests must be done in order to confirm the possibility of diffusion. For this experiment, the water outside of the tubing can be tested for the presence of starch which comes from the tubing through the dialysis membrane. If it is positive for starch, therefore it is considered as a small molecule.

Daily light exposure and their final height

The reason why the plant exposed to light for only 2 hours per day was the shortest is because, the nutrients received is also short therefore, the growth is also minimal.

If another plant of the same species was exposed to 16 hours of light per day, we could assume that the maximum size in cm would still be 35 cm. This is because of the last 2 recorded hours, 12 and 14, had the same growth which means that the maximum growth this plant could reach is 35 cm.

One effect of temperature change on the oxygen content of fresh water is that in every increase in temperature, the fresh water oxygen content in parts per million decreases.

The new power plant could affect the Rocky river because having this power plant could increase the temperature of the river thereby decreasing the oxygen content of the river and as a result, carp may only be the one to survive this change.

These drugs must be tested on both human and animals in order to know the effects of the drug to those that would be using it. Drugs usually have a testing period for both humans and animals in order to know also their long term effects.

Mice are often the tested by scientists because they are genetically modified to have the same DNA or genes in order to prevent discrepancies in the results of the trials.

Control variables are not merely the target of the experiment but are used as a variable to compare the experimental group. This is used in order to make a reference for the experimental group.

Two conditions that must be kept constant is the same type of environment and the same type of living conditions such as food intake and daily activity.

The data that should be collected must have a separate result for both control and the experimental groups. This is to compare the outcome or effect of the drug to the subjects.

An example of an experimental result would be that those in the experimental group who had wounds were healed in a shorter time than those in the control group.