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Pachacha [2.7K]
3 years ago
15

Biodiversity is important to maintain stability in an ecosystem. In order to maintain species numbers over time, which two proce

sses must be equivalent?
A) speciation and extinction
B) mutation and crossing over
Eliminate
C) emigration and immigration
D) sexual and asexual reproduction
Biology
1 answer:
blagie [28]3 years ago
6 0
Emigration and immigration
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Cara is explaining to her sister how the solar system formed. Which description would she use to explain the solar nebula
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Answer:

The correct answer is A. a rotating cloud of dust and gas.

Explanation:

Nebulae are regions of the interstellar medium (clouds) made up of gases (mainly hydrogen and helium) and dust. In other words, nebulae are concentrations of gas in which we find hydrogen, helium and stardust in greater quantities. They are structures that are actually very important for the universe, this because inside it is the place where stars are born, which arise due to the condensation and aggregation of matter. The nebular theory states that the Solar System reached the form current from a solar nebula (a gas cloud), more than 4.5 billion years ago. The large cloud of molecular gas was affected by a certain phenomenon that would have taken place in the vicinity. Like the explosion of a supernova or the passage of a star that would produce a strong gravitational impact. The result of this event made the matter agglomerate in different places. The high concentration of matter caused the nebula to collapse. Becoming a protostar, (bodies whose characteristic is to be surrounded by clouds and contain preplanetary matter inside), that is, gaseous matter in the outermost part and solid inward. At the core of this structure, the temperature is so dominant that nuclear reactions take place to compensate for the gravitational force. This leads to a hydrostatic equilibrium and the formation of a fundamental star: the Sun. The rest of the mass flattened, forming a protoplanetary disk where the protoplanets were being formed, which would evolve to become the current planets, their satellites and the others bodies of the solar system.

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3 years ago
Plants use sunlight to convert nutrients into energy. What form of energy transfer is taking place? The__ energy of the sun is c
andrezito [222]

Answer:

radiant   and    chemical

Explanation:

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Help me for biology please <br><br> and noooo linksss
Aleks [24]

Answer: I haven't seen "wolves change rivers", whatever that is, but my best guess would be "carrying capacity"

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Study of the anatomy, physiology, pathology, and chemistry of the cell is known as
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The general term of it all is Cytology, which means the study of the cells. This in turn is split into smaller sciences like Cytophysiology (Study of cell physiology and anatomy), Ctyopathology (Study of diseases effects on cells), and Cytochemistry (study of cell biochemistry). 
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emily wants to know how green, blue and red color light affects plant growth compared to natural light. (Hint: what light affect
MArishka [77]

Red and blue colored lights are most effective for plant growth.

Plant Growth is the dependent variable and light color is the independent variable. The rest are control variables.

A Control variable is the part of the experiment that we keep the same throughout all of the test subjects. An independent variable does not depend on other variables and a dependent variable does.

Allow me to explain. When we perform an experiment, many factors that can change the results, For this reason, it is common practice to keep many of them the same for all test subjects (In this case for all of the plants). This way we know that if changes are measured, they were not caused by these variables. These are what we call control variables.

An independent variable does not depend on other variables to remain the same. For example, the species of plant would be an independent variable, given that a plant cannot change its species because of other factors.

A dependent variable does change according to other variables and is often what we try to measure. For this example given, the dependent variable is how much the plant will grow with each colored light.

Knowing that plants rely on light to produce the energy needed to grow, we can <u>hypothesize</u> that applying different colors of light will have an effect on plant growth. To test this, we can create an experiment where we use:

  • Soil
  • amount of water
  • amount of light
  • species of plant
  • length of experiment

As control variables.

One group of plants will have blue light, another green, and another red. We can identify the color of light as an independent variable.

Since what we seek to measure is plant growth, we identify this as our dependent variable and measure it for each plant after a set amount of time, to compare results.

With this, you can confidently identify the control, dependent, and independent variables and how to use them in your experiment.

To learn more about experiments try: brainly.com/question/17314369?referrer=searchResults

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3 years ago
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