Answer:
The statement that best represents a function of lipids within an organism is that they are components of cell membranes.
Explanation:
Lipids are biomolecules formed by the binding of fatty acids, important for structure, compound synthesis and energy reserve.
In living beings, one of the most important functions of lipids is to be the main component of cell membranes.
Specifically, phospholipids associate to form a double layer, called lipid bilayer, capable of acting as a semi-permeable membrane, due to its non-polar or hydrophobic character. In this way, <u>membrane lipids fulfill a structural and protective function of the cell and its contents</u>.
Regarding the other options:
- <em>Proteins are made up of amino acids, not lipids.
</em>
- <em>Lipids are not constituents of the DNA structure.</em>
Answer:
Some factors that may cause a decrease in population size:
- a high mortality rate due to an infectious disease
- a low birth rate
- a high mortality rate due to interspecific competence
- a high emigration rate
Explanation:
In biology, population size (N) refers to the total number of individuals in a given population. The four main factors that affect population size are birthrate (natality), death rate, immigration rate (i.e., the number of individuals of a given species that move into a population), and emigration rate (i.e., the number of individuals of a given species that move out of a population). Both birthrate and immigration are known to increase N, while death rate and emigration are rates known to decrease this value.
<span>B. Most organisms tend to be fairly neutral in their pH level. Neutral (or close to) pH levels would be in the range between 5 and 8. A pH level of 7.0 is truly neutral, so anything in that level would be considered close to the mark. 1-4 is highly acidic and has few organisms, while 9-14 would be highly basic/alkaline and also has few creatures.</span>
I think the answer is "ARE NOT"
