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3 years ago

Why copes ideas about the evolution of tetrapods were considered a hypothesis and not a theory

1 answer:

8 0

Cope's Rule postulates that animal groups tend to evolve through time towards larger body size. Even though larger body size is often advantageous trait it isn’t always that way (larger organisms require greater amount of food, and can have problems when food is sparse).

But this postulate isn’t theory, because body size increase through time, but the mean body size often doesn’t.

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3 years ago

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“Based on genes that have been activated, a cell breaks down important cell parts, essentially causing death.” This statement is

Zarrin [17]

Answer:

Apoptosis, is an orderly process in which the cell's contents break down and are packaged into small packets of membrane for “garbage collection” by immune cells.

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3 years ago

Proteins, nucleic acids, and carbohydrates are grouped by common structural features found within their group. lipids can be gro

PIT_PIT [208]

Proteins, nucleic acids, and carbohydrates are grouped by common structural features found within their group. lipids can be grouped based on their high solubility in nonpolar solvents, and their preponderance of nonpolar groups.

Non-polar solvents cannot dissolve a polar compounds since no opposite charge exist, and the polar compound is not attracted. It is this becuase of absence of partial charge that also makes these molecules non-polar. Some of examples of non-polar solvents include benzene, hexane, pentane, toluene, etc.

Higher the solubility of a compound is that the larger the amount of the compound which can dissolve in a solution.

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2 years ago

This is an extinct member of the Homo genus known from Pleistocene specimens found in Europe and parts of western and central As

Inga [223]

Answer:

The correct answer will be- Homo neanderthalensis

Explanation:

The closest ancestor of modern humans which evolved in the Pleistocene age which was around 7 lakh to 3 lakh years is the Homo neanderthalensis or Neanderthals.

The Neanderthals became extinct around 12,000-10,000 years ago by competitive Homo sapiens.

The specimens of Neanderthals are collected from the central and Western Asia and parts of Europe and showed approximately the same cranial capacity which is around 1450-1500 cc.

Thus, Homo neanderthalensis is the correct answer.

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3 years ago

What have the scientific studies identified as the major cause of acid rain in the united states?.

Vadim26 [7]

Burning of fossil fuels that release sulphur and nitrogen compounds into the air is identified as the major cause of acid rain in the united states.

<h3>What are the causes of acid rain?</h3>

Acid Rain is created when sulphate and nitrogen oxides from the atmosphere react with rainwater and fall as a result.

Sulphur and nitrogen particles that mix with the wet elements of rain are the main causes in the production of acid rain.

Due to air pollutants, notably the excessive levels of sulphur and nitrogen released by machinery and industrial operations, acid rain is made up of water droplets that are extremely acidic.

The emissions that are released from industries are man-made causes.

The natural causes, such as lightning strikes in the atmosphere that release nitrogen oxides and volcanic eruptions that release sulphur oxide.

The complete question is :

What have the scientific studies identified as the major cause of acid rain in the United States?

a )chemicals still in the atmosphere from the asteroid collision with the earth

b) excess solar radiation due to the depletion of the ozone layer

c) volcanic ash in the air

d) burning of fossil fuels that release sulphur and nitrogen compounds into the air

To learn more about acid rain , refer:

brainly.com/question/6700006

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3 0

1 year ago