A swim bladder is a gas-filled sac that helps fish maintain buoyancy. the evolution of the swim bladder from lungs of an ancestral fish is an example of __________.

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Answer 1
Answer: exaptation - when a limb evolves and takes on a new function

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Is cytokinesis a part of mitosis

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Cytokinesis is part of M-phase, but not part of Mitosis. M-phase consists of nuclear division (mitosis) and cytoplasmic division (cytokinesis). And yes, telophase is part of mitosis, so it's in M-phase too.
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What is the scientific definition of energy? A. the ability to use the stored potential of an object B. the ability to use the change in direction of an object C. the ability to use an applied force in order to make an object move D. the ability to use the change in temperature of an object

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Correct answer: C). The ability to use an applied force in order to make an object move

The energy can be defined as the capacity to move an object by the application of the force. It can exist in various forms such as chemical, electrical, mechanical and nuclear. It can not be created but it can be transformed from one form to another form of energy. It is the driving force of the universe.

Hence, the correct answer would be option C.


the answer is C. The ability to use an applied force in order to make an object move.

Which statement about DNA in one of your vrain cells is true?

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Answer:

I hoped this helped

Explanation:

Variation of ecological habitats within a species is characteristic of which type of diversity? a. Genetic diversity b. Ecosystem diversity c. Species diversity d. Regional diversity.

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The answer is letter B. ecosystem diversity. The marine biome is the largest of all the ecosystems. Ecological diversity is one of the type of biodiversity. It is the different kind of the ecosystems found in a region or the variation in ecosystems over the whole planet.

Answer:

The correct answer is option b."Ecosystem diversity".

Explanation:

Ecosystem diversity is a term used to describe the variations of abiotic and biotic conditions that could be present within a geographical location. This type of diversity is characteristic of species that live in different ecological habitats, such as deserts, forests, oceans, steppe, among others. For instance, rats are small mammals that have adapted to live in most habitats in the world.

The moon's gravitational pull causes _____.deep ocean currents
deep ocean waves
longshore currents
tides

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I would say the answer is tides

Which of the following statements helps support the endosymbiotic theory?Choose 1 answer:
A
All cells contain ribosomes that conduct protein synthesis.
B
Cells contain genetic information in the form of DNA.
If isolated from a eukaryotic cell, mitochondria can no longer survive and reproduce on their
own.
If isolated from a plant cell, a chloroplast can survive and reproduce on its own.

Answers

Answer:

C. If isolated from a eukaryotic cell, mitochondria can no longer survive and reproduce on their own.

Explanation:

The endosymbiotic theory proposes that early eukaryotic cells evolved from endosymbiotic interactions among prokaryotic cells. This theory states that mitochondria and chloroplasts were once primitive bacterial cells that were ingested by large anaerobic prokaryotic cells, and then these cells benefited from living and working together. The most important lines of evidence that support this theory are that mitochondria and chloroplasts contain their own genetic material (circular DNA) and their own protein biosynthesis machinery (ribosomes).

Final answer:

The statement supporting the endosymbiotic theory claims chloroplasts can survive and reproduce on their own when isolated from a plant cell. This suggests these organelles, once independent prokaryotic cells, retain certain autonomous features despite integration into the eukaryotic cells.

Explanation:

The endosymbiotic theory proposes that certain organelles in eukaryotic cells, such as mitochondria and chloroplasts, originated as independent prokaryotic cells that were engulfed by a host cell. This event allowed a symbiotic relationship to develop, which subsequently led to the development of eukaryotic cells. The option that best supports this theory is: 'If isolated from a plant cell, a chloroplast can survive and reproduce on its own.'

This statement suggests that chloroplasts, like the bacteria from which they evolved, maintain some ability to live independently. Yet, although they contain their own DNA and ribosomes (symbols of their independent past), they are no longer 'free-living'. Similarly, mitochondria are also likely to have been independent entities because they too contain their own DNA and ribosomes. However, having been integrated into the host cell, they can no longer survive on their own, contrary to what might be inferred from the third option. The first and second options simply represent characteristics of all cells and provide no specific support for the endosymbiotic theory.

Learn more about Endosymbiotic Theory here:

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