Which two biogeochemical cycles depend directly on photosynthesis?

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Answer 1

Answer: The answer is "The oxygen cycle and carbon cycle".

In Earth science, a biogeochemical cycle or substance turnover is a pathway by which a synthetic substance travels through both the biotic (biosphere) and abiotic (lithosphere, air, and hydrosphere) parts of Earth.

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in a well-fed state, brain cells use which one of the following compounds circulating in the blood stream almost exclusively as an energy source?

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Glucose is virtually the sole fuel for the human brain, except during prolonged starvation. The brain lacks fuel stores, thus requires a continuous supply of glucose. It consumes about 120 g daily which corresponds to an energy input of 420 kcal (1760 KJ), accounting for some 60% of the utilization of glucose by the whole body in the resting state.

What is the special feature of the leaves of C4 plants?

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The special feature is that it contains mesophyll and budndle sheath cells which is photosyenthesis is separated in each of them.

the special feature of the leaves of the c4 plants are:they contain chloroplasts both in the mesophyll and a budle sheath cellIn c4 Plants, the CO2 used in photosynthesis is combined with another compound so the y are able to be exposed to oxygen without RuBisCo

Which example represents a DISADVANTAGE of asexual reproduction? A) Genetic variety slowly causes hundreds of species of beetles to form from a single species. B) A single antibiotic is able to quickly and easily kill millions of genetically identical bacteria. C) Millions of bacteria are quickly produced by cell division, in one afternoon in a jug of milk that has been left on the counter. Eliminate D) Male anglerfish must live on larger females as parasitic mates, since they encounter other anglerfish so infrequently in the deep ocean.

Answers

Answer:

The correct answer would be an option B.

Asexual reproduction is a reproduction in which offspring are produced from a single parent.

It does not involve fusion of gametes and crossing over due to which the offspring contain identical genome as that of parents.

This reduces the genetic diversity in a population due to which all the organisms of a population are at equal risk of extinction under unfavorable conditions such as high temperature, antibiotics, change in pH of surrounding medium et cetera.

Thus, the disadvantage of asexual reproduction is the lack of genetic diversity due to which a single antibiotic is able to kill millions of genetically identical bacteria.

What would most likely occur over time if new technologies gave us information that challenged what scientists currently understand about natural selection

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Question options:

A new scientific law would be established and proven by the findings. A new scientific theory would be established and proven by the findings. A current scientific law would be revised based on the new findings. A current scientific theory would be revised based on the new findings.

Answer:

A current scientific theory would be revised based on the new findings.

Explanation:

If new findings came about and challenged the current theory of natural selection so that Darwin's theory didn't look like it was true at all, the initial theory(darwin's theory of natural selection) would not be entirely discarded but revised according to these new findings and then form a sort of backbone to this new theory which would be based on findings of many independent researchers and not just one. Example: how some of Sigmund Freud's theories or Aristotle's may not be entirely valid today but still works as a fundamental for understanding other theories.

Lipids are organic macromolecules that serve a variety of purposes. What is the most important role of lipids?

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Answer:

The answer is energy storage.

Explanation:

Lipids are a set of organic molecules, which consist mainly of carbon and hydrogen and, to a lesser extent, oxygen. Lipids fulfill diverse functions in living organisms, including energy reserve. Lipids (usually in the form of triacylgeroles) constitute the energy reserve for late or deferred use of the organism. Their caloric content is very high (10 Kcal / gram), and they represent a compact and anhydrous form of energy storage.

the most important role of lipids is to store energy.

The portion of the stomach that is superior to the junction between the stomach and the esophagus is the

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Pyloric sphincter [made up of sphincter muscles]
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I am not sure of the answer though

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Two species of flies, Drosophila melanogaster and Drosophila simulans, can mate. They usually do not mate, however, even if they are kept together in a laboratory. Males court the females of both species, but the females prefer to mate with males of their own species. Which isolating mechanism does this describe?A.)behavioral B.)temporal C.)geographical D.)anatomical