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3 years ago

Which statement below best describes the role of mutations in evolution by natural selection?

Biology

1 answer:

umka21 [38]3 years ago

6 0

Answer:

B. Mutations increase the genetic variation within a population, and some of the variants may provide an advantage to individuals over time

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What negative affects do humans have on the earths oceans

9966 [12]

Answer:

many

pollution by dumping chemical that are harmful to the animals

littering by plastic

accidentally introducing invasive species

over fishing

it lowers the biodiversity of the aquatic ecosystems living there

Explanation:

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3 years ago

The term "semi-conservative" used to describe DNA replication means that: *

Nady [450]

Semi-conservative DNA replication means that one stand is new DNA and the other contains a newly synthesized strand.

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3 years ago

These individuals had theories of evolution by natural selection, but did not receive the same credit that Darwin did: Group of

Sergeeva-Olga [200]

The individual who did not receive the same credit as Darwin was Alfred Russel Wallace.

<h3>What is the evolution theory?</h3>

The evolution theory is a scientific theory explaining how natural selection may change (evolve) phenotypes across generations.

Alfred Russel Wallace was an evolutionary biologist who understood the importance of natural selection on this process.

In conclusion, Alfred Russel Wallace did not receive the credit as Darwin.

Learn more about natural selection here:

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2 years ago

What is the role of phospholipids and proteins in controlling the passage of substances across the cell surface membrane, making

Anastaziya [24]

Phospholipids are the substance/structure that is the building block of the cell membrane. Without phospholipids, we wouldn't even have a cell membrane and wouldn't really have any way how to shield and guard or control th epassage of substances across the cell surface. The cell membrane is at the same time partially permeable; this means it will let certain ions that can be found in the intra and extracellular fluid in and out, while others will be kept from moving so freely.

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3 years ago

According to the Endosymbiotic Theory, infoldings in the cell membrane of an ancestral prokaryotic cell gave rise to endomembran

Ad libitum [116K]

Explanation:

<u>False:</u> C) The ER provides separate microenvironments for each of the modifications that must take place to proteins.

The golgi apparatus comprised of several components called cisternae, these function as different microenvironments, where further modification proteins and lipids into functional biomolecules occurs.

During protein synthesis, transcription occurs in the nucleus, followed by translation within ribosomes, the newly synthesized proteins enter endoplasmic reticulum where they undergo folding and modification. Within the golgi body, the proteins are tagged and parceled into lysosomes for export.

Further Explanation:

The endoplasmic reticulum is a membrane system within the cytoplasm that extends from the outer nuclear membrane. Apart from increasing the surface area within the cell, this continuous system also carries out protein folding, synthesis and transport. In the endoplasmic reticulum or ER, some sections called the smooth ER, do not contain ribosomes, and may contain lipids, enzymes, and other proteins. Other sections bound to ribosomes, are called the rough Er. As a protein destined for the endomembrane system is being synthesized by a ribosome, the first amino acids in the growing polypeptide chain act as a signal sequence. That signal sequence ensures that the ribosome binds to the outer membrane of the ER and that the protein enters the ER lumen. The proteins undergo major modifications and are packed into vesicles.

Golgi bodies are flat, disk-like membranous regions. Proteins traverse the organelle by first having their vesicles bind to the cis face or receiving end. Like a post office, the golgi complex, or golgi body recognizes specific signal sequences, targets and further modifies and packages these compounds into lysosomes for delivery to their final destination. Proteins here undergo peptide processing and glycosylation

Learn more about cellular life at brainly.com/question/11259903

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4 years ago