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Answer:

Observations are receiving knowledge of the outside world through our senses, or recording information using scientific tools and instruments.

Any data recorded during an experiment can be called an observation.

Answer: Mahir noticed the plants he watered grew taller than those with less water.

Explanation:

Answer:

Despite the risk of DNA damage and cancer production, X-rays are still used by doctors because the benefit of this diagnostic study outweighs the risk, which in most cases is very low.

Explanation:

Diagnostic radiology studies, such as X-rays and CT scans, are procedures that use ionizing radiation to obtain images of the inside of the body. Prolonged or constant exposure to this type of radiation is harmful because there is a risk of producing damage to DNA and can lead to the development of cancer.

However, the use of X-rays and CT scans are non-invasive diagnostic methods whose information provides an accurate diagnosis of a disease and, when well used, has a very low risk of organ damage.

Ionizing radiation is measured in milisieverts (mSv) and exposure from radiologic studies is in the range of 0.1 to 10 mSv per study. The amount of ionizing radiation a person is expected to receive per year from exposure to their environment is in the order of 3 to 5 mSv per year, so diagnostic imaging studies involve a low risk of organ damage.

Doctors continue to use X-rays as a diagnostic study, despite the risk of cancer and DNA damage, because the benefit —accessible, noninvasive, and cost-effective— far outweighs the risk.

Answer:

they compare fossils to other fossils to see if skeleton changes are observed in a species over time it indicates that there is genetic change going on within the species

Answer:

Science uses fossil evidence to support evolution theories because you can link similar fossils among creatures from millions of years ago, to the living creatures of today.

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Answer:

A

Explanation:

Answer:

See the answer below

Explanation:

The greenhouse effect refers to the heating effects produced by the earth's atmosphere on the planet as a result of the atmosphere absorbing reflected radiation from the sun by the earth.

The earth's atmosphere is a blanket of gases, some of which are referred to as greenhouse gases. These gases have the capacity to trap radiations coming from the sun that is reflected by the ground layer of the earth. Thus, they produce a warming effect on the earth.

A bulk of the radiation coming from the sun is reflected back into space by the earth's stratosphere. The small percentage that passes through are dispersed in different directions and some of them pass through the atmospheric blanket to reach the ground layer of the earth. While some are absorbed by the ground itself, some are emitted back into the atmosphere where the greenhouse gases trap a large portion and prevent them from escaping back into space.

This leads to the warming of the earth and the entire phenomenon is referred to as the greenhouse effect.

Answer:

The water passes through the filter paper.

Explanation:

Since sugar is able to dissolve completely in water, sugar solution is a homogenous mixture and thus its composition is uniform throughout and is able to be filtered out without separating its components.

Answer:

C. They have trouble moving materials in and waste products out

Answer:

The answer above is false the correct option is Isabel Allende.

Explanation:

I did the quiz and it was correct.

Answer:

3

Explanation:

the probable pH of the stomach is around 3

Answer:

H. 3

Explanation:

The probable pH of the stomach is 3.

Answer:

I believe it's 80%

Explanation:

Cellular Respiration is the process that takes place in cells to convert food into energy. This process is also known as internal respiration.

Answer:the answers are a and d

Explanation:

I did the test sorry if wrong

In the given image, it is showing that plants use carbon dioxide gas to make sugars during photosynthesis. The correct option is D.

The carbon cycle is nature's method of recycling carbon atoms, which travel from the ambience into Earth's living organisms and then back into the atmosphere. The majority of carbon is stored in rocks and sediments, with the remainder in the ocean, environment, and living organisms.

Plants consume carbon dioxide and sunshine during photosynthesis to produce fuel i.e., glucose and other sugars for the construction of plant structures. The fast biological carbon cycle is built on this process.

Thus, the correct option is D.

For more details regarding carbon cycle, visit:

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Your question seems incomplete, the missing image is probably the below one.

Answer:

1.DNA is more than 99% similar between any two people. All the differences in how we look, feel, behave and the differences in our health are due to less than 1% difference

2.In humans each of these cells have 2 copies of the DNA, but in strawberries each of these have 8 copies of the DNA that means strawberries have 4 times as many copies of DNA as humans, making it 4 times easier to see.

Explanation:

Answer:Ice melts when heat energy causes the molecules to move faster, breaking the hydrogen bonds between molecules to form liquid water. In the melting process, the water molecules actually absorb energy.

Explanation:

Answer:

1 goes to c  2 goes to b and 3 goes to a

An electric discharge is the release and transmission of electricity in an applied electric field through a medium such as a gas. ... As the charge on these particles builds up, the result is the often-spectacular discharge of electricity known as lightning

Answer:

decreases

Explanation:

any decrease in the population can lead to a signal of extinction

any increase is result of rapid growth

Answer:

DNA testing has gone mainstream. The cost of DNA sequencing has reduced faster than Moore's Law. With an estimated cost of $100 in the foreseeable future, DNA sequencing becomes more accessible and opens up new use cases, such as wider adoption of population sequencing

Explanation:

Answer:

The weaker gravity on the moon is due to its' smaller mass.

Answer:

It increases the temperature of the reaction.

Explanation:

Enzymes increase the speed of the chemical reaction. The reaction usually gets faster when the temperature is high. As a result, I think that this is the best choice of all.

Answer:

In the electron transport chain, electrons are passed from one molecule to another, and energy released in these electron transfers is used to form an electrochemical gradient. In chemiosmosis, the energy stored in the gradient is used to make ATP.

Answer:

1. Individuals in a species vary in characteristics because of differences in their genes.

Individuals will be born with various characteristics due to their genes for instance some people are short and other are tall.

2. Individuals have to compete when resources (such as food)  are limited.

Resources are generally limited so individuals would have to compete t get those resources and survive.

3. Individuals with variations that help them get more of the  resources are more likely to survive.

Some of the characteristics that these individuals have which are different will give them an edge and enable them to get more resources and thus survive.

4. Individuals that survive can pass their genetic variations on to  their offspring.

The individuals that survive will now have offspring and will pass on their genes to their offspring which give give them the same edge their parents had.

5.   Over time, there are more individuals with the variations that  are well adapted to the environment.

Eventually there will be more of those offspring that can adapt as opposed to those who couldn't and keep dying out.

Answer:

Testosterone

Explanation:

Testosterone is a chemical messenger that the brain lets out to upper and lower body muscles. Testosterone chemical messenging happens when you're exercising, pumped with adrenaline, or sexual activity.

Answer:

osmosis is the movement of a solvent across a membrane, so water

Answer:

april

Explanation:

Answer:

April 1st

Explanation: