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patriot [66]
3 years ago
11

How do scientists know that dark matter and dark energy exist even if we can not see them

Biology
1 answer:
Gre4nikov [31]3 years ago
7 0

Answer:

We only know it's there because we can see the effect of its gravity. Scientists study dark matter by looking at the effects it has on visible objects. Scientists believe that dark matter may account for the unexplained motions of stars within galaxies. Computers play an important role in the search for dark matter information.

Explanation:

Hope That helps!

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Are mules an example of speciation? Why or why not?
solniwko [45]

Answer:

Hybrids are the offspring of two species. A mule is the hybrid offspring of a female horse and male donkey. Because mules are sterile, they are not classified as a distinct species. The biological species concept connects the idea of a species to the process of evolution.

7 0
3 years ago
In which case is an inherited mutation most likely to be expressed?
Helga [31]
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8 0
3 years ago
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Describe three properties you can use to distinguish between organic and inorganic compounds
motikmotik
Organic compounds and inorganic compounds differ from each other. Three differences are :
1. Organic compound has carbon and hydrogen atoms while the inorganic compound has other atoms.
2. Organic compounds make the important biomolecules such as amino acids, proteins, DNA, RNA, etc whereas the inorganic compounds make the salts, acids, bases, etc.
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5 0
3 years ago
Se the information from the article to answer the question.
Svetach [21]

Answer:

A. near-Earth objects.

Explanation:

Science can be defined as a branch of intellectual and practical study which systematically observe a body of fact in relation to the structure and behavior of non-living and living organisms (animals, plants and humans) in the natural world through experiments.

When scientists discuss objects that might hit Earth, the term which they use to describe them as a group is near-Earth objects.

A near-Earth objects can be defined as a small solar system body such as comets and asteroids whose orbit draws it close or in proximity to the earth's orbit due to the gravitational force of attraction of nearby planetary bodies.

Basically, if the closest approach of a planetary body to the Sun is less than 1.3 AU it is considered to be a near-Earth objects.

Hence, near-Earth objects may pose a collision danger to planet earth.

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B: nucleus, mitochondria, cell membrane

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a is wrong because only plant cells have cell walls

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