1) Explain the relationship between continental drift and the formation of the Earth’s Oceans?

1 answer:

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2)How did volcanoes affect the origins of the seas?
answer) Volcanoes released water from the core and rock strata putting it into the atmosphere. Traditional theory says no volcanoes = no water = no oceans. More recent theory suggests that a good portion of the water on earth may have come from commentary bodies.

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A scientist adds colchicine, a microtubule polymerization inhibitor, to a cell entering mitosis. At metaphase, the chromosomes o

defon

Answer:

Colchicine is also known as mitotic poison. When it is added the separation of chromosomes of daughter cells are stopped. 

Explanation:

This is because the formation of spindle fiber is not allowed in the mitosis phase. Basically it is the process of arresting the mitosis at metaphase to study the chromosomes properly.

The addition of colchicine prevents the chromosomes to move to opposite poles. It makes the cell polyploidy. Hence the of addition of colchicine is the polyploidy of the cell.

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3 years ago

Which of the following correctly sorts the organizational levels of a ecosystem form least inclusive to most inclusive

Naddika [18.5K]

Answer:

population - community - ecosystem - biosphere

Explanation:

The correctly sorted level of organization of an ecosystem from the least inclusive to the most inclusive would be from population to community to ecosystem and finally to biosphere.

A population consists of a group of organism of the same species living in a particular area at a particular time and capable of interbreeding to produce fertile progeny.

A community represents different population of organisms that are interacting with one another. Several populations make up a community.

An ecosystem consists of different communities of organisms that are interacting with themselves and the non living component of the environment.

A biosphere consists of all regions of the earth where living organisms can be found. It consists of different ecosystems that make up the earth.

Hence, the population is least inclusive, followed by the community, then the ecosystem and finally the biosphere.

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3 years ago

Simply, transcription is a copy of __________

WITCHER [35]

Answer:

b. mRNA from DNA

Explanation:

Transcription is the process of synthesis of RNA using a DNA template strand. The process of transcription occurs inside the nucleus in eukaryotes as their DNA is present in the nucleus.

The process includes unwinding of DNA double helix to expose the DNA template strand. The enzyme RNA polymerase binds to the specific start sites on the DNA template strand and starts making its RNA copy.

The newly formed RNA undergoes modification in eukaryotes before serving as a template for protein synthesis. However, in prokaryotes, the process of transcription and translation can occur simultaneously.

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3 years ago

Illustrate how body cavities distinguish branches of development of animals with bilateral symmetry.

Katarina [22]

Answer: no body cavity—acoelomates; body cavity not completely lined with mesoderm—pseudocoelomates; body cavity completely lined with mesoderm—coelomates

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3 years ago

Which of the following life processes requires oxygen in order to prceed

TEA [102]

aerobic respiration requires oxygen.

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4 years ago