Explanation:
Biodiversity refers to the diversity of biology or living organisms on Earth. The biodiversity is responsible for maintaining various biogeochemical on this planet.
The biodiversity has been drastically affected by the anthropogenic factors which has caused the deterioration of biodiversity.
The main anthropogenic factors are:
1. Habitat fragmentation: the human activities like construction of road passing through the habitat for organisms can lead to habitat fragmentation which could decrease the gene flow in the species.
2. Deforestation: the cutting of trees has led to the extinction of species.
3. Climate change : Global warming is the result of the industrial revolution initiated by humans in 19th century.
4. Exploitation of natural resources: the humans have continuously exploited human resources for their use.
5. Hunting of animals: The hunting of animals is one of the major factor for extinction of animals.
The theory of continental drift suggests that the continents have moved in the past and they are still moving today. Continental drift theory seeks to explain the phenomena of plate tectonics and the movement of land masses across the planet. This theory is related to the theory of Pangea or the time when all of the continents were connected to one another millions of years ago.
<span>Combustion reaction is a chemical reaction where compounds and oxidants produce heat and new product during their reaction. The reaction between a HC (hydrocarbon) and O (oxygen) to produce CO2 (carbon dioxide) and H2O (water) is a standard form of a combustion reaction. Therefore,the correct answer would be A.
It is the combustion of gas (Methane, CH4) when it encounters oxygen (2O2). Methane will burn forming C02 gas and H20 gas.</span>
Answer:
The cell membrane of a living plant cell selectively regulates the passage of substances into and out of the cell (option A).
Explanation:
The plasma membrane in a living plant cell is composed of a double lipid layer that gives it hydrophobic character and acts as a semi-permeable barrier. The partial permeability of the substances allows regulating the passage of substances from and to the interior of the cell.
At the level of the plasma membrane there are several mechanisms and transport to allow the entry of substances needed for the cell or the output of synthesized products or metabolic waste, thus regulating the passage of substance in a selective way.
Regarding the other options:
<em> B. Plasma membranes are composed of lipids, not just carbohydrates and proteins.
</em>
<em> C. Permeability is not for all substances, but is selective.
</em>
<em> D. Plasma membrane is a lipid bilayer, not a double layer of proteins.</em>
State of matter (solid, liquid, gas) is an example of physical property
