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DerKrebs [107]
2 years ago
7

The Cretaceous-Tertiary extinction, the most famous of the Big Five, has been attributed to what major event(s) that triggered t

he extinction of the dinosaurs? an asteroid hitting the earth massive volcanoes erupting around the world rapid growth of forests on land surfaces falling sea levels increased competition from mammals
Biology
2 answers:
polet [3.4K]2 years ago
5 0

This question has a two part answer. The first part is that an asteroid hitting the earth and the second part is massive volcanoes erupting around the world.

inna [77]2 years ago
3 0

Answer:

The correct answers are "an asteroid hitting the earth" and "massive volcanoes erupting around the world"

Explanation:

The Cretaceous-Tertiary extinction was an event that take place approximately 66 millions years ago responsible of taking the life of about three-quarters of the plant and animal species on Earth. Two different events are the ones that contributed to this massive extinction: an asteroid hitting the earth and massive volcanoes erupting around the world. The asteroid was 10 to 15 km wide, impacted on Mexico's Yucatan Peninsula, and caused global environmental damage. This damage inlcude triggering the eruption of most active volcanos in the world.

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Organisms that eat cows do not obtain a great deal of energy from the cows. In fact, they get less energy than the cows obtain f
marshall27 [118]

Answer:

The cow uses all but stores ten percent of what they eat.

Explanation:

For example, a plant produces 100 percent energy. The plant needs to use the energy for survival.

When a cow eats the plant, it only gains 10 percent of the energy.

Then, say a wolf eats the cow.

The wolf only gets 1 percent of the energy that is produced by the plant.

5 0
2 years ago
The backbone of DNA and RNA is composed of . DNA is double stranded due to interactions between adenine, cytosine, guanine, and
gayaneshka [121]

The backbone of DNA and RNA is composed of sugar and phosphate.

DNA is double stranded due to interactions between adenine, cytosine, guanine, and thymine, which are nitrogenous bases.

Uracil is a nitrogenous base that is only used with RNA.

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2 years ago
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Fuel cells are a particular type of electrochemical cell that require a constant source of chemical fuels, or reactants, during
bazaltina [42]
A fuel cell works like a battery. It consists of two electrodes where the reactions would occur and an electrolyte solution which allows for caharged particles to flow. In a fuel cell that uses hydrogen and oxygen as reactants. The hydrogen would enter the cell at the anode where oxidation would happen. So that the species that is formed in the anode side would be hydronium ions and electrons. The oxygen, on the other hand, would enter the cathode electrode where reduction occurs. The species that are produced in this side of the cell are water molecules. Together, the net reaction is called a redox reaction.
7 0
2 years ago
What component of enzyme structure is responsible for enzyme specificity
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A few enzymes<span> exhibit absolute </span>specificity<span>; that is, they will catalyze only one particular reaction. Other </span>enzymes<span> will be specific for a particular type of chemical bond or functional group. In general, there are four distinct types of </span>specificity<span>: Absolute </span>specificity<span> - the </span>enzyme<span> will catalyze only one reaction.</span>
4 0
2 years ago
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A stream of water holds thriving bacteria. If drought conditions caused the stream to dry up, how would the bacteria mostly like
Alexeev081 [22]

The answer is they produce endospores.

Explanation:

The endospores are dormant, non-reproductive, tough bacterial spores that ensure the survival of bacteria in adverse conditions.

During the environmental stress, such as starvation, desiccation, radiation and chemical treatment many bacteria form dormant endospores. These endospores germinate again when the conditions become favorable.

Hence, if drought conditions lead the stream to dry up, the bacteria that live there would produce endospores to survive.

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2 years ago
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