Periods of time when evolution took place quickly followed by long periods of stability

Biology

1 answer:

mihalych1998 [28]2 years ago

6 0

Answer:

The theory of punctuated equilibrium states that evolutionary change is characterised by short periods of rapid evolution followed by longer periods of stasis in which no change occurs. ... To meet this challenge, evolutionary biologists attempt to describe how and why evolutionary changes accumulate over time

Explanation:

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What would be the expected frequency of dewlap extensions and pushups in males while in the presence of females and a predator v

svp [43]

Answer:

Explanation:

Lower frequency for both dewlap extension and pushups. In the presence of predators and females an increase in the dewlap frequency and pushups is expected as a result of defense and breeding mechanisms mixed while in the second situation we have just breeding mechanisms involved

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3 years ago

Describe how the artificial heart is different from a normal heart?

borishaifa [10]

Answer:

An artificial heart is a prosthetic device that is implanted into the body to replace the original biological heart. It is distinct from a cardiac pump, which is an external device used to provide the functions of both the heart and the lungs. Thus, the cardiac pump need not be connected to both blood circuits.

Explanation:

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Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures,

lesya692 [45]

Answer:

this is a TRUE statement.

Explanation:

Different microbes grow in a wide variety of environmental conditions; however, most have preferences for certain temperatures, pH, and atmospheric gases because although microbes are widespread in their occurrence,they are found almost everywhere,in the air,water,soil,food,decaying matter,oil deposits,in plants etc.

but their number and their types vary according to the locality and environmental conditions.

Although, some microbes are always present and contribute towards natural flora BUT besides this others are present in specific environments such as some in hot springs bearing very HIGH TEMPERATURE RANGES for example: Thermus aquaticus.

some of them inhabit the acidic or alkaline soil feeding on HUMUS.

Most of the microbes prefer ATMOSPHERIC GASES i.e some require oxygen for their survival .For example: Pseudomonas.

some don't require O2 for survival i.e Spirochete.

IN SHORT, most of the microbes have preferences for various environmental conditions.

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3 years ago

The _______ is the part of the brain that is responsible for the formation of new long-term declarative memories.

NISA [10]

The answer would be the hippocampus it is responsible for the formation of the nerves to make long-term memories.

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The eukaryotic cell has multiple membrane-enclosed compartments. This evolutionary innovation provides what advantage to the cel

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Explanation:

One of the main differences between prokaryotes and wukaryotes is that the last ones have a nucleus and organelles with their own membranes. This carachteristic allow them to organize into multicellular organisms isolating different processes (enzymes, reactants) making them easier to manage and more efficient due to the smaller volume that increase the rate of reactions.

I hope you find this information useful and interesting! Good luck!

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2 years ago