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sergey [27]
3 years ago
6

What is the meaning of friction​

Biology
1 answer:
Ann [662]3 years ago
4 0

Answer:

Friction is the resistance to motion of one object moving relative to another

Explanation:

It is not a fundamental force, like gravity or electromagnetism. Instead, scientists believe it is the result of the electromagnetic attraction between charged particles in two touching surfaces

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A(n) __________ is the preserved or mineralized remains (teeth, bones, etc.) or imprint of an organism that lived long ago.
lutik1710 [3]
The correct answer for the question is B. Fossil. 
Fossils are remnants, traces of animals or plants, from the past ages that have been preserved. Fossils may be classified as cast and mold fossil, insect preserved in amber, petrified wood, compression fossil of a fern and pyritized ammonite. 
6 0
3 years ago
Read 2 more answers
What evidence can support the theory of evolution?
Verdich [7]
Evolution by natural selection is one of the best substantiated theories in the history of science, supported by evidence from a wide variety of scientific disciplines
8 0
4 years ago
Need help with biology questions?
lakkis [162]

Answer:

this is the answer to number 2

Explanation:

the answer is nutrients and energy

8 0
3 years ago
QUE SON LA BIOMOLECULAS​
DIA [1.3K]

Son consideradas biomoléculas aquellas moléculas que forman parte de los organismos vivos.  

Las moléculas son las unidades físicas de la materia, que se forman a partir de la unión de dos o más átomos agrupados a través de enlaces químicos.

Las biomoléculas se clasifican en inorgánicas u orgánicas.

• Las biomoléculas inorgánicas se encuentran ampliamente en la atmósfera. El agua, algunas sales como el cloruro de sodio, y gases como el oxígeno, son ejemplos de biomoléculas inorgánicas.  

• A las moléculas como azúcares, proteínas, combustibles, entre otras, las cuáles contienen átomos de carbono, hidrógeno, oxígeno y a veces nitrógeno se les llama moléculas orgánicas.

Cuando las moléculas orgánicas forman parte de la materia viva, se les conoce como biomoléculas orgánicas, las cuales incluyen fundamentalmente glúcidos, lípidos, proteínas y ácidos nucleicos.

Por lo tanto, podemos concluir que las moléculas (compuestos que se forman a partir de los elementos químicos) que se encuentran formando los seres vivos se conocen como biomoléculas y se clasifican en inorgánicas u orgánicas.  

Aprende más acerca de las biomoleculas aquí: brainly.com/question/24345880            

5 0
3 years ago
a scientist isolates all of the mrnas in a kidney cell and reverse transcribes them into dsdna. the dsdna copies are then insert
SVETLANKA909090 [29]

When the dsDNA copies are then inserted into vectors and cloned into E. coli. the scientist has produced a cDNA library.

A collection of DNA fragments that have been cloned into vectors to identify and isolate desired DNA fragments is known as the DNA library. cDNA libraries and genomic libraries are the two types of libraries.

cDNA (Complementary DNA )library: cDNA is a DNA copy of an mRNA molecule that is produced by reverse transcriptase, a DNA polymerase that can use RNA or DNA as its template.

  • These are made by using mRNA as their starting material as templates.
  • They only represent genes in the genome that are expressed under particular conditions.
  • Because cDNA lacks introns, prokaryotic cells can express it.

Know more DNA libraries here: brainly.com/question/14233038

#SPJ4

3 0
1 year ago
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