Answer: Smooth Muscle
Explanation: Smooth muscle cannot be controlled consciously and thus acts involuntarily.
Answer:
D.electrical signals and chemical neurotransmitters
Explanation:
chemical transmitters are the language that neurons use to connect eachother.
12) B. The organism would suffer as its cells would be less able to provide the energy needed to carry out life functions.
13) D. The central vacuoles in the cells lose water and can no longer help support the cells.
14) A. It acts as a framework inside the endoplasmic reticulum and keeps it from collapsing.
15) D. The cell's energy level will diminish as the enzyme decreases.
16) C. Whales are able to conserve oxygen better than humans.
17) A. Glycolysis
18) i dont know this one but maybe B
19) B. It is turned into more chlorophyll for the plant.
20) B. The chloroplasts would be unable to generate ATP.
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It represents the history of time which ends up being divided on the basis of the earth's biotic composition
Answer: The conversation process where nitrogen gas combines with hydrogen to form ammonium ions is known as THE ACTION OF THUNDERSTORMS while when air in the top layer of soil comes into contact with certain bacteria, nitrogen in the air is converted by NITROGEN- FIXING MICROORGANISMS.
Explanation:
About 79% of air is composed of gaseous nitrogen. However, only a few microorganism can make use of this nitrogen. The important sources of nitrogen for plants and most living organisms are the inorganic nitrogenous compounds in soil. In nature, nitrogen is constantly being removed from the soil and returned to it through the NITROGEN CYCLE
Conversation of gaseous Nitrogen into nitrogenous substances such as ammonium and amino-compouds are carried out by:
--> The action of thunderstorms, and
--> NITROGEN- fixing microorganisms.
During thunderstorms, Nitrogen reacts with oxygen to form nitric oxide. The nitric oxide is oxidizes to Nitrogen peroxide which dissolves in rainwater to form nitric and nitrous acid. When these acids enter the soil, they combine with mineral salts to form nitrates. The nitrates then, dissolve in soil water and are absorbed by the plants. These nitrates are converted into plant proteins and become part of the plant body.
Some microorganisms such as the Nitrogen fixing microorganisms are able to absorb nitrogen from the atmosphere and change it into amino-compouds and proteins. Examples of such microorganisms include:
--> the free living bacteria: these include the azotobacter and clostridium
--> the symbiotic bacteria: the rhizobium which is found in the root nodules of leguminous plants