Explanation:
The experimenter alters the independent variable with the hopes of collecting data about how the dependent variable changes in response.Other variables have to be controlled so that any changes of the dependent variable are attributed to the known independent variable.

<h3>
The answer to this will be is : </h3><h2 /><h2>
C. Plant roots grow into a crack in a rock.</h2><h2 /><h2>

</h2><h2 />
▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
Because "mechanical weathering" It's a example of the Plants roots that grow on into a crack in the rock.
Hope It Helped!
<u>And Tell me if The answer is wrong. . .</u>
<h2>
<u>Good Luck With Your Assignment!</u></h2><h2 />
#LearnWithBrainly

ノシ
Answer:
cytoplasm
Explanation:
I rlly hope this helps. its what I remember but goodluck
The answer would be Haemoglobin.
The Haemoglobin is a red pigment found in RBCs of vertebrates that helps to transport oxygen to various tissues.
Vertebrate blood is bright red when it is oxygenated and dark red when it is deoxygenated. Some animals such as crustaceans or mollusks, use haemoglobin to carry oxygen instead of hemoglobin.
Hope This Helped!