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Verdich [7]
3 years ago
12

All __ are molecules, but only molecules made up of atoms from two or more elements are compounds.

Biology
1 answer:
Lapatulllka [165]3 years ago
4 0
D) molecular components
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Classify the structures homologous or analogous, depending on their structure and function
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Analogous structures have a different evolutionary ancestries but they have the same function

while homologous structures are the opposite; they have similar ancestries and common traits but maybe not have the same function in an organism

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Which statement represents dehydration synthesis? decomposition by hydrolysis carbohydrate polymers formed as water is removed w
nirvana33 [79]
<span>The answer to this question is the second option-" carbohydrate polymers formed as water is removed". In the dehydration synthesis, polymers are created. This is when two molecules formed a new product which results the loss of water. So, this is a process of forming or making a new compound together with the removal of water.</span>
4 0
3 years ago
Scientists originally thought cell membranes evolved before RNA. However, recent evidence suggests RNA developed before the memb
Darya [45]

Answer:

The need for replication, specialization, compartmentalization is key to understand that RNA evolved first

Explanation:

Logical contrast considering a certain catalytic activities of cardinal importance in the early evolution of life ;

• using an RNA molecule that is involved in to catalyzing the process of templated polymerization –selecting a random RNA molecule as a template.

• the ribozyme activity in this process must have engaged an in vitro process in a body part that no longer has a function such that it that can only synthesize moderate lengths of RNA

• when this molecules acts on the copies of itself can replicate

• when it acts on copies of other type of RNA molecules in its surrounding he can promote their replication

• a cooperative system might have evolved from the neighbors to help the survival of this friendly RNA molecules – through catalytic actions, such that a set of different types of RNA molecules evolves with a mark of specialization for different activity.

The development of individual compartments is proposed to be akin to the effective self-replicating systems.

• If RNA molecules are mutually beneficial they may serve the purposes of being specialized for templated polymerization.

• If these RNAs were free to diffuse among a large population of other RNA molecules, they could be assimilated into an established group by other replicating systems, which in turn may compete with the original RNA system for raw materials.

• The quality of the self-replicating systems they generated relies on the compartment that restricts the RNA molecules only to the system they serve.

• compartments started simply and perhaps had simple adsorption on surfaces or simple particles.

• compartmentalization became complex requiring a class of small molecules with varying physicochemical properties liike being amphipathic.

• This gave rise to the phospholipids mainly and the present-day cells often are coated by a plasma membrane consisting of amphipathic molecules in this configuration.

3 0
3 years ago
Your science teacher asks you to build a model of a cell. The model should look like a city, and buildings in the city should re
Mariulka [41]

Answer: The correct answer is B)  city hall:control center.

As per the question, model of cell looks like a city where different buildings correspond to different organelles ( membrane bound subcellular compartments like nucleus, golgi complex, vacuole, endoplasmic reticulum).

Nucleus is a specialized membrane bound compartment that possesses the genetic material ( DNA) of the Eukaryotes ( like plants and animals).

Nucleus controls all the essential activities of the cell by regulating the expression of gene ( segment of DNA corresponding to a particular protein).

Therefore, in the model of cell, city hall;control center represents the nucleus of the cell.


5 0
3 years ago
Read 2 more answers
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