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Oxana [17]
3 years ago
9

Which feature of DNA represents the highest (or most complex) level of structure?

Biology
1 answer:
mario62 [17]3 years ago
7 0
The correct option is CHROMOSOMES.
The chromosomes is the DNA molecule which is made up of all the genetic material of an organism. Chromosomes is found in the nucleus and it has a thread like appearance. A single chromosomes can contain as much as thousand of genes.
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In a population fulfilling all the assumptions of the Hardy-Weinburg equilibrium, allelic frequencies:
Rzqust [24]

Answer:

A. will not change from generation to generation.  

Explanation:

For a population in the Hardy-Weinberg equilibrium, allele frequencies do not change from generation to generation and remain constant. This occurs when:

-The population is large enough.

-Individuals of the population exhibit random mating .

-No evolutionary force (natural selection, mutation, gene flow, etc.) is operative on the population.

Under these conditions, the allele frequencies of the population are not changed and the population is said to be in "Hardy-Weinberg equilibrium".  

3 0
3 years ago
Compare and contrast the extracellular matrix of animals and the cell wall of plants. Consider their functions and the types of
mario62 [17]

Answer:

The plant cell wall is strengthened by the molecular structure of cellulose. Cellulose is made up of ß-glucose arranged upside down, this arrangement aided hydrogen bonds between the hydrogen ions of the  hydroxyl group and oxygen of the of the ring   of same  betta -glucose.

The aggregation of the hydrogen  bonds give bundles of  strong tensile  strength of cellulose called the  microfibrils (of 60-70 celluose molecules).They are  held together in bundled called fibers.T<u>hese is the source of  plant cell walls  strength. </u>

<u />

Collagen is the main extracellur matrix (EM) in animal cells.It is a glycoprotein made up of 25%of body protein of animals.Each collagen molecule is made of helix shaped ,three polypeptide chains, wound around each other to form<u> triple helix.</u>The bonds  holding helix together are hydrogen and covalent bonds.

Each triple helix is attached to adjacent collagen molecule, parallel  to it. The covalent bonds formed a cross link which held  the collagen molecules together forming FIBRILS.  This gives flexibility to collagen, while maitaing strong tensile strength. This is what is responsible for the structural strength of cell membrane .

.The  EM,is  futher reinforced with  carbohydrate molecules(proteoglycans) which<u> aided in water movements by  osmosis following  sodium movements into the matrix.</u>

3 0
3 years ago
Would you use an observational, experimental, or modeling approach to study a rare, endangered bird species
son4ous [18]

Answer:

The correct answer would be - observational approach.

Explanation:

Observation approach is the research technique that involves the observation  of the subject or participates behavior in their natural habitat or state. This will be one of best approach to study.

Similarly when characterizing new findings various aspect of  experimental, Observational details or modelling approaches will help in identification , classification and nomenclature. However, in comparison to experimental and modeling approach is more appropriate method for the rare endangered species.

Thus, the correct answer would be - observational approach.

3 0
3 years ago
. What causes cells to stop dividing?
LekaFEV [45]
Love and Unity :) just kiddddding aging cells stop dividing because they become senescent. They do this by sending chemical signals to each other so that they know
4 0
3 years ago
In 2003, the list of endangered species included 82 fish, 20 amphibians, 78 reptiles, 258 birds, and 316 mammals. About how many
lara [203]

Answer:

238

Explanation:

If you subtract 78 from 316 you get 238.

3 0
3 years ago
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