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Ilia_Sergeevich [38]
3 years ago
13

A kind of variable that a researcher purposely changes in an investigation is...

Biology
2 answers:
RUDIKE [14]3 years ago
7 0

The independent variable, because the I.V. is what you wil change throughout your experiment.

loris [4]3 years ago
6 0
The variable that researchers manipulate is the independent variable.

The reason for this is because in experiments different manipulations are often introduced. The sole purpose of these manipulations is to see whether they will affect our independent variable and if they will change its value. 
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Help with these two questions, porfavor! :'/
Aliun [14]

The number of chromosomes does not correlate with the apparent complexity of an animal or a plant:

in humans, for example, the diploid number is 2n = 46 (that is, 23 pairs), compared with 2n = 78, or 39 pairs, in the dog and 2n = 36 (18) in the common earthworm.

4 0
3 years ago
Read 2 more answers
All cells need energy to live. How do the organelles in the plant cell above work together to get and use this energy?
Sloan [31]

Answer:

chloroplast: makes food for plant cells, photosynthesis

mitochondria:produces energy the cell needs to carry out its functions; release energy

vacuole: stores food, water, and waste

lysosome: found mainly in animal cells, digests old cell parts

endoplasmic reticulum: carries proteins and other materials from one part of the cell to the other

cytoplasm: gel -like fluid where the organelles are found

nucleolus: makes ribosomes, center of the nucleus

ribosome: makes proteins

cell membrane:controls

Explanation:

I'm pretty sure the answer is D based on the info above,and because its the only one that has the correct information about the cell parts

hope its correct

4 0
3 years ago
Read 2 more answers
Where does Dobson unit used in ?????​
Vsevolod [243]

Answer: ozone concentration

Explanation: The Dobson Unit is the most common unit for measuring ozone concentration. Becuse ozone concentration is hard to measure they use The Dobson Unit.

6 0
3 years ago
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1. Flowering plants and bees have influenced each other's evolution, providing an example of
Doss [256]

Answer:

1. coevolution

2. abiogenesis

3. Endosymbiont Theory

4. It's estimated that over 99 percent of the species that have existed on Earth at some point in time are extinct today.

5. Coevolution implies that the evolution of one species is dependent on and works in relation to the evolution of another species. This may cause positive or negative impacts and could be beneficial to both organisms or only to one.

6. This theory states that the first building block of life that allowed for reproduction of organisms was the development of self-replicating RNA. This hasn't been able to be fully demonstrated in any science experiment but is based on the idea that there are RNAs that can catalyze biochemical reactions on their own without proteins.

7. This process points to the development of structures through the envelopment of smaller cells that perform specific functions. This is how eukaryotic cells evolved from prokaryotic cells.

8. This experiment was important because it showed that, in the right primordial soup, organic compounds could develop from inorganic compounds.

Explanation:

penn foster

8 0
3 years ago
Read 2 more answers
What are the items that attach on the inside of the mineral to give the mineral its shape
Tom [10]

Answer:

Molecules.

Explanation:

Molecules are the items that attach on the inside of the mineral to give the mineral its shape. The molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.

Due to the fact that, these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.

4 0
3 years ago
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