D- both involve moving substances across a membrane
Reasoning:
-Active transport moves against the concentration gradient ( low to high)
-Passive transport moves higher to lower concentration
Explanation:
While exercising, the muscles need additional energy as the breathing rate and volume of each breath increases to bring more oxygen into the body and remove the carbon dioxide produced. The heart rate increases to supply the muscles with extra oxygen and remove the carbon dioxide produced.
Answer:
A
Explanation:
Amoebas reproduce through binary fission which is a form of asexual reproduction.
One result of weathering of rocks is the formation of soils.
Since weathering of rocks breaks down the surface of rocks, it affects the ground beneath them. This in turn results in formation of various kinds of soils, so I'd say B is the correct answer.
