A confounding variable refers to an external effect, which modifies the influence of an independent and dependent variable. This extraneous effect is used to affect the outcome of an experimental design. The confounding variables can ruin the experiment and can generate unnecessary outcomes.
In the given case, confounding variables can be introduced by testing multiple hypotheses at a time and by using distinct kinds of soil in each of the samples.
Answer:
Uracil
Explanation:
In DNA, guanine pairs with cytosine and adenine pairs with thymine. In RNA, thymine changes into uracil.
The Endocrine system regulates the bodies metabolism, growth and sexual function and development.
Answer:
1. Another word for chemical weathering is b. disintegration
Chemical weathering is a process by which the rocks are broken down into parts and sediments by the action of a chemical agent such as alkali or acid. The disintegration can be a natural process by which a solid body is broken down into parts or subparts.
2. d. moving water is not an agent of chemical weathering agent.
The chemical weathering can be caused by the agents like lichens which secretes acid on the rock surface and causes it's disintegration, acid rain and salt water are chemical agents that can cause the disintegration of the rock but moving water will have little influence on the hard rock surface.
3. c. chemical weathering is a process which turns rocks and minerals into new substances. The chemical weathering process brings change in the chemical composition of the rocks due to the action of the weathering agents hence, on disintegration of rocks new substances are formed.
For God's sake I need that quick response.
Replace as letters in parentheses with words that correctly complete sentences.
The water and salts are emitted by (A) form a liquid called (B).
This liquid is transported through a system of tubes, from (C) to (D).
The plant then have sugars, which will be part of a sap, called (E).
This sap is carried by a system of tubes, called (F), to the too many parts of the plant.