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3 years ago

What causes the light to refract as it passes from air to water?

Biology

1 answer:

Anastasy [175]3 years ago

8 0

Answer:

Light refracts whenever it travels at an angle into a substance with a different refractive index (optical density). This change of direction is caused by a change in speed. When light travels from air into water, it slows down, causing it to change direction slightly. This change of direction is called refraction

Hope this helps.

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certain cells have densely packed mitochondria and the cristae ( infolded projections of a mitochondrion) are very closely toget

sveta [45]

Answer:

What can be deduced of cell that have densely packed mitochondria and the cristae are very closely together is that its function requires large amounts of energy.

Explanation:

Mitochondria are cellular organelles in charge of energy production. In these organelles occurs oxidative phosphorylation and electron transport chain, whose final product is ATP, an energy molecule.

A <u>cell with a large number of mitochondria, whose crests are very close together and tight, belongs to a tissue that has a lot of activity and its energy requirement is high</u>.

An example of cells with densely packed mitochondria are skeletal muscle and heart muscle.

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3 years ago

Which statement indicates that the patient who is taking an adrenergic-blocking drug understands the importance of avoiding othe

Vilka [71]

Answer:

Answer is 2, "I should avoid drinking my morning coffee while taking this drug".

It should be noted that, the question is incomplete, because the options were not included. But, the likely options are,

"I should limit my fluid intake while taking this medication."

"I should avoid drinking my morning coffee while taking this drug."

"There's no need to stop eating chocolate while I'm on this medication."

"One glass of red wine with meals will not interfere with the medication."

Explanation:

Adrenergic - blocking drugs are also known as beta blockers. They are drugs or medicines used in treating or preventing high blood pressure, irregular heart beat, heart attack among others.

The activities of these drugs make the heart to beat slowly with less force, thereby lowering the blood pressure. Examples of these drugs are corgard, visken, atenolol, labetalol among others. These drugs might show side effects like weakness, headache, dizziness etc.

In this sense, Food items containing caffeine, like coffee, should be avoided when taking the drugs , because, caffeine affect the work of beta blockers in the body.

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3 years ago

An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, which include

QveST [7]

An ecologist studying plants in the desert performed the following experiment. She staked out two identical plots, which included a few sagebrush plants and numerous small, annual wildflowers. She found the same five wildflower species in roughly equal numbers on both plots. She then enclosed one of the plots with a fence to keep out kangaroo rats, the most common grain-eaters of the area. After two years, to her surprise, four of the wildflower species were no longer present in the fenced plot, but one species had increased dramatically. The control plot had not changed. Using the principles of ecology, propose a hypothesis to explain her results.

Explanation:

This example highlights the impact of plant predation on species selection. In the fenced off plot animal predation is not a factor on plant selection.
In this case plants will compete for resources only with each other and in this case one plant had a selective advantage over the other 3 species of plants. In the plot exposed to animal predation the ratio of the four species is equal.
This is likely do to an increased preference of animals for the plant species that dominates in the fenced off plot and/or anti-animal predation tactics by the other three species.

a.Hypothesis: kangaroo rats are keystone species

-Reintroduce kangaroo rats (and the other locally extinct species)

-Should observe equilibrium re-established

b.Hypothesis: kangaroo rats exert top-down control on community

-Reintroduce kangaroo rats (and other locally extinct species)

-Increase kangaroo rat population in other plot

-Decrease (but don't eliminate) kangaroo rat population in other plot

c.Hypothesis: Locally extinct species inferiorly competed with the extant species of plant

-Remove surviving species from other plot (and remove kangaroo rat population)

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3 years ago

An annual mustard plant survives only one month during which it produces 50 flowers. each flower produces a fruit containing 20

V125BC [204]

Answer:

Replacement rate

Explanation:

In biology, replacement level or replacement rate refers to the amount number of offspring required to be produced to keep the level of population at a stable state without causing it to much decease.

Scientists use the replacement rate of plant and animal specie to assess the rate at which the population is reproducing at a stable level or are at some threshold zone and need to be taken care of.

Here in question, we see that some specific properties of mustard plants are focused that, plant survives only one month during which it produces 50 flowers. each flower produces a fruit containing 20 seeds.

It clearly do not depicts the population size of mustard plant, or niche or fitness, it just describe the replacement rate that how many offspring does mustard plant produce to keep its population at a stable or steady state without being getting into a danger of extinction.

Hope it help!

6 0

3 years ago

Which is the BEST example of technological design

yulyashka [42]

The BEST example of technological design is researching a disease resistant corn hybrid.

8 0

3 years ago

Read 2 more answers