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2 years ago

What is a gene pool? what is natural selection? Who is Charles Darwin?

Biology

1 answer:

notsponge [240]2 years ago

8 0

Answer:

A gene pool is the stock of different genes in an interbreeding population.

Natural Selection is the process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution.

Charles Darwin is a English naturalist whose scientific theory of evolution by natural selection became the foundation of modern evolutionary studies.

Explanation:

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What feature is used by both the respiratory and digestive systems?

Aleksandr [31]

The digestive and respiratory tracts include the pharynx. The pharynx is found at the back part of the throat and is connected to the mouth and the nasal cavity. It then extends to connect into the esophagus and larynx. The pharynx serves as passageway for air during respiration and food for digestion.

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3 years ago

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Proteins may be classified according to their three-dimensional shapes. Determine whether the following examples and description

m_a_m_a [10]

Answer:

-often function as enzymes or transport proteins ⇒ globular proteins

-peptide chains arranged in long strands, or fibers ⇒ fibrous proteins

-peptide chains highly folded into spherical shapes ⇒ globular proteins

-keratins ⇒ fibrous proteins

-hemoglobin ⇒ globular proteins

-water-soluble ⇒ globular proteins

-collagens ⇒ fibrous proteins

-insoluble in water ⇒ fibrous proteins

-generally function in structure and support ⇒ fibrous proteins

Explanation:

<u>Fibrous proteins </u>are composed by large polypeptide chains which interact each other and form large structures. They have water insoluble and have structural and protection functions- they are components of cells and tissues. Examples are: collagen, fibronectin, keratin, elastin, actin.

<u>Globular proteins</u> have a spherical compact structure in which hydrophobic aminoacids are buried inside the structure and hydrophilic aminoacids (which can interact with water molecules) are exposed to the exterior medium. For this, they are water soluble. They have often transport and catalytic functions. For example: hemoglobin, mioglobin, albumin, enzymes in general.

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3 years ago

In a balanced ecosystem, the number of consumer is?

vova2212 [387]

The number of producers is greater then the number of consumers , primary consumers is greater then the number of secondary consumers and the secondary consumers is greater then the number of tertiary consumer

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2 years ago

How do enzymes speed up chemical reaction?

Gekata [30.6K]

In the human body, enzymes function as catalysts to speed up reactions by helping to lower the activation energy needed to start a reaction.

Although some RNA molecules can also act as enzymes, proteins constitute the vast majority of enzymes.

The primary function of enzymes is to decrease the activation energy, or the energy required for a process to start. Enzymes bind to reactant molecules and hold them in place to enable the chemical bond-forming and bond-breaking processes.

The energy of the transition state, which products must pass through in order to become reactants, is reduced by enzymes.

Instead of using energy to move till they collide at random, they might group the reactants together to make it easier for them to interact. They could direct the process along a different pathway with lower activation energy.

By tying them to the active site, they might place the reactants correctly. As a result, the reactants can interact with less energy because they won't have to fight against intermolecular forces that would normally try to separate them.

Temperature, ionic circumstances, and environmental pH all have an impact on how quickly an enzyme.

For more information on enzymes: brainly.com/question/13981863

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