Biologists are the people who study and research about most of the things that are related to living things, including plants, animals, bacteria etc.
Example of topics they study include "ecology", like how different living organisms relate and interact with each other, or "cell biology", with small topics like how protein synthesis works or what is DNA or RNA.
Area of scientific studies that usually fall outside biology includes "astronomy" the study of space, or" chemical bondings", like how does elements react with each other.
Expansion of the universe. The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. ... To an observer it appears that space is expanding and all but the nearest galaxies are receding into the distance.
Answer:
D. electron transport proteins
Explanation:
In order to identify which faction contains the mitochondria, we have to test for the presence of the substance that is common to mitochondria alone. Insulin receptors, aquaporin, phospholipids in the outer membrane, and polysaccharides are not unique substances common to mitochondria. Electron transport proteins are unique to mitochondria, which are present in the inner membrane of mitochondria.
A mitochondrion has an outer and an inner membrane. The inner membrane is not easily permeable as the outer membrane, and as such, the inner membrane contains electron transport proteins that help in that regard. The presence of electron transport protein is the unique substance to be tested for, to determine the fraction that contains the mitochondria.
Answer:
D
Explanation:
results in the release of calcium ions from the sarcoplasmic reticulum.
option D is the 1st process that starts the excitation-contraction coupling.