Answer:
Crude oil or also called "liquid fossil fuel"
Explanation:
Crude oil is most common is most fuel products. And in the commercial Pennzoil, the guy mentions crude oil, which can wear down engines.
Explanation:
6) Unicellular is an organism with one cell, while multicellular is an organism with multiple. Both of them create organisms/living things.
7) Organelles are located in the cell and perform certain jobs.
8) Prokaryotes are organisms made up of cells and Eukaryotes are also organisms made up of cells.
9) Tissues come together to create organs, organs work together to help bodily functions.
Answer:
Genetic variability refers to a species's genetic variation as a whole. Specific changes in DNA fragments or genes are referred to as genetic variants, and each mutation of a gene is referred to as an allele.
Explanation:
Hope this helps!
Please mark me as Brainlinieast.
Answer:
d
Explanation:
Liquid water is more dense that solid water because, solid water has more in it.
Don't forget to rate
Answer:
pressure changes of alternating contraction and relaxation during the cardiac cycle.
Explanation:
Opening and closing of heart valves are regulated by changes in the blood pressure of various heart chambers during the cardiac cycle. During atrial systole, the higher blood pressure in the atria opens both AV valves and forces the blood to enter the ventricles. The semilunar valves are closed. During ventricular systole, the higher blood pressure in the ventricles opens both semilunar valves to allow the blood to enter the pulmonary trunk and aorta. At this time, both the atrioventricular valves are closed.