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Ne4ueva [31]
2 years ago
7

Without photosynthesis, life would not have been able to proliferate the way it had over the past several million years. Identif

y which single called organism made this possible
Biology
1 answer:
Vladimir [108]2 years ago
7 0

Answer:

This is the Photosynthetic Cyanobacteria. it was the ability of this unicellular organisms million of years ago, through photosynthesis; that  lead to the emergence of  separate singular organisms  the  plants. Plants constantly undergo photosynthesis as it absorbs CO2, and make use of sunlight to to produce carbohydrates  for  animals to survive. And this leads to  the emergence of animals which feeds on the plants, and therefore re population of the  Earth occurs.

Explanation:

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"tertiary structure of a protein is maintained by (list the interactions)"
erik [133]

<span>Protein tertiary structures are known to be a three dimensional structure of a protein with a single polypeptide chain (backbone) and one or more protein secondary structures known as protein domains.</span>

Tertiary Structure Interactions

1) Hydrophobic Interactions: they are non- covalent bonds and very important in the formation of tertiary structure. 

2) Ionic Bonds: the interaction of both positive and negative amino acids forms a bond that helps to stabilize the protein molecules. 

3) Hydrogen Bonds: this bond exit between the amino acid with hydrophilic side chain found on the surface of the molecules and water molecules in a solution.

4) Disulfide Bridges: it is a strong covalent bond commonly found between cysteine residues in close proximity space. 

7 0
3 years ago
All macronutrients, vitamins and minerals provide energy. <br> a. true <br> b. false
erastova [34]

Answer:

True

Explanation:

Macros are macronutrients. Your body needs these nutrients in larger amounts in order to function properly as macro means large. In addition, all of these nutrients provide your body with energy measured in the form of calories or kcals. There are three types of macronutrients: carbohydrates, proteins, and fats.

Hope it helps

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8 0
1 year ago
Most colonies on streak plates grow from isolated colony-forming units. on rare occasions, however, a colony can be a mixture of
umka2103 [35]

<span>To verify the purity of a colony, a number of steps could be adopted. Pick the colony and dissolve it in sterile water (approximately 5ml), streak in media again and incubate. Observe if it produces pure colonies of the chosen organisms and if not, repeat the procedure until pure colonies are produced. Additionally, one could perform additional tests that categorize bacteria such as Gram staining.   </span>


7 0
2 years ago
Read 2 more answers
Elastic fibers are important to muscle tissue since they resist excessive stretching and help muscle fibers spring back to its o
brilliants [131]

Answer:

True

Explanation:

Elastic fibers are composed of elastin, myofibrils and fibrillin. They are distributed <u>separately</u>, and therefore do not form bundles(they actually form a kind of mesh), like collagen fibers.

Elastic fibers are usually thin and long and can stretch up to 1.5x of their total length.

These fibers confer elasticity to the connective tissue. The mesh formed of elastic fibers easily yields to minimal tensions, returning to its original shape as soon as the deforming forces cease.

An example of the action of elastic fibers is when we pull the skin from our hands and release it, the elastic fibers are responsible for quickly returning the skin to its original shape.

8 0
2 years ago
Need help on this question
Mice21 [21]

Answer:

the answer is D which is CJD

8 0
1 year ago
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