What are the components needed in order for an experiment to be valid? Identify these components in the following experiment: A scientist is testing a new plant food to see if it causes plants to grow faster. The scientist tests two plants with the new plant food, and two plants he grows without plant food.

Answers

Answer 1

Answer: . Growing two plants without plant food at all doesn't count; in order to see if the new food is better, he must also grow plants with the original food in order to compare it.
have an independent variable. This is the type of plant food. It's independent because he has direct control over it.give plants the same conditions besides food: same water (amount), same light exposure, same temperature, etc.

choose a quantitative way to measure how much the plants grew, like mass or length.i need brainlest anwser to rank up help

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How did short term catastrophic events, such as volcanic eruptions and asteroid collisions affect the climate and biosphere?

Answers

Dust particles and debris from the collision float up into the Earth's atmosphere, thus blocking the sun's rays. When volcanoes erupt, they can cause chemical clouds to linger in the atmosphere, also blocking the sun's natural rays

Give reason
Variation maybe one but not only the cause of evolution.

Answers

Answer:

the only hereditary variants can pass their hereity to the future generation

Hair would be dry and brittle without the presence of? A) sebaceous glands B) keratin C) melanin D) fat

Answers

Answer:

A) sebaceous glands

Explanation:

Sebaceous glands are responsible for producing and secreting sebum, a substance that can lubricate and waterproof the skin and hair, giving them a brighter appearance.

However, a highproduction of sebum through these glands can cause exaggerated greasiness in the hair as well as acne on the skin.

Meanwhile, low sebum production can leave the skin dull and dehydrated, causing premature aging, and leaving hair dry and brittle due to lack of lubrication.

Actually keratin is not correct

The correct answer to your question is

Sebaceous Glands.

Photosynthesis continues to increase with temperature. true true within limits not true

Answers

The answer is true within limits.

Photosynthesis occurs in the leaves of green plants. During photosynthesis, carbon dioxide and water are converted into using the energy of sunlight glucose and oxygen. Thus, the limiting factors for photosynthesis are carbon dioxide, light intensity, and temperature.
Temperature affects an activity of some enzymes characteristic for light independent reactions. It actually doubles the enzyme rate for every 10°C. So, if temperature increases, the rate of these enzymes will increase, as well as the photosynthesis rate. But, this is limited. After reaching optimum temperature, the photosynthesis rate will decrease because the enzymes will denature.

Answer:

true within limits

Explanation:

What substance is made during transcription and where does it occur

Answers

The substance that is made during transcription is mRNA ( messenger RNA). This occurs in the nucleus.

Maribel places her backpack and lunch bag on a lab table where there are lab materials. What is the safest way for Maribel to arrange the items?Both the personal items and the lab materials should be arranged neatly along the edge of the table.

Both the personal items and the lab materials should be arranged in the center of the table.

The lab materials should be in the center of the table, and the personal items should be on the edge of the table.

The personal items should be off the table, and the lab materials should be placed neatly away from the edge of the table

Answers

The answer is The personal items should be off the table and the lab materials should be placed neatly away from the edge of the table.
As a general rule, personal items and lab items should not mix, especially food items like a lunch bag. Certain lab materials can be dangerous if touched or handled without the proper protective gear. By placing personal items so close, you are increasing the risk of accidents, which is also why lab materials should be away from the edge of the table.

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