Answer: 1. algae and certain protists bacteria 2. Chloroplasts
Explanation: Tell me if you need an explanation and I'll add one
Answer:
The cell membranes are <u>Selectively permeable</u> or <u>semi-permeable.</u>
Explanation:
The cellular membrane allows the free passage of only a few substances while it blocks the pass of others.
Cellular membranes are <em>composed mostly of lipids arranged with their hydrophilic polar heads facing the exterior and the interior of the cells, while their hydrophobic tails are against each other</em>, constituting the internal part of the membrane.
Through this lipidic bilayer, some molecules can move from one side of the cell to the other. This free movement is called simple diffusion, and it depends on the substances' sizes and their concentration on each side of the membrane.
The membrane is selectively permeable because it only let small substances to move through it, with no protein mediating their passage.
so the first one is sodium chloride
second one is Magnesium oxide
Third one is Calcium hydroxide
Answer:
Option C, It can regulate temperature
Explanation:
Carbon atom is able to form bonds with other carbon atoms or atoms of hydrogen , oxygen , nitrogen , phosphorus etc. A carbon forms a diamond/graphite when it joins cohesively while they form molecules like hydrocarbons, CO2 etc, when it joins adhesively with other than carbon atoms. Thus Option A is incorrect
Since carbon combines with other chemical atoms to form polymers, lipids , proteins etc, as they are adhesive to other than carbon atoms. Option B is also incorrect.
Option C, is a physical phenomena in which carbon compounds do not allow heat to escape from earth and in this way it regulate the temperature of earth. This is not an internal property of carbon and hence option C is correct.
Option D is incorrect as carbon can be easily decomposed along with production of energy by decomposers or by burning the fuels containing carbon.