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Inessa [10]
4 years ago
5

The factor that is being manipulated in a controlled experiment is called the

Biology
1 answer:
Korolek [52]4 years ago
3 0
Answer:  "independent variable" .
_________________________________
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Two identical alleles for the same gene present in a cell
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Answer:

The correct answer is D.

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The close proximity of capillaries to the alveoli in lungs improve respiratory efficiency by ______.
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Decreasing the distance for diffusion.
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What are the three parts of the modern cell theory?
Rus_ich [418]

Explanation:

The classical cell theory was proposed by Theodor Schwann in 1839. There are three parts to this theory. The first part states that all organisms are made of cells. The second part states that cells are the basic units of life. These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells. The third part, which asserts that cells come from preexisting cells that have multiplied, was described by Rudolf Virchow in 1858, when he stated omnis cellula e cellula (all cells come from cells).

Since the formation of classical cell theory, technology has improved, allowing for more detailed observations that have led to new discoveries about cells. These findings led to the formation of the modern cell theory, which has three main additions: first, that DNA is passed between cells during cell division; second, that the cells of all organisms within a similar species are mostly the same, both structurally and chemically; and finally, that energy flow occurs within cells.

5 0
2 years ago
Read 2 more answers
Choose one endangered wildlife species terrestrial vertebrates describe the third
Ray Of Light [21]
  1. giant panda (Ailuropoda melanoleuca)
  2. tiger (Panthera tigris)
  3. whooping crane (Grus americana)
<h3>What is endangered species?</h3>

A species that is threatened with extinction in the near future, either globally or within a certain political jurisdiction, is known as an endangered species.

Whooping Crane:

With its pure white plumage, scarlet crest, bugling call, and exquisite mating dance, the Whooping Crane is the tallest bird in North America and one of the most impressive. It is one of our rarest birds and a symbol of the perseverance and innovation of conservation biologists. The species' population fell to about 20 birds in the 1940s, but numbers have since increased to over 600 thanks to captive breeding, wetland management, and a ground-breaking program that teaches juvenile cranes how to migrate.

For more information regarding endangered species, visit:

brainly.com/question/11174478

#SPJ1

6 0
2 years ago
Explain how strong acids differ from strong bases in reference to H+ and OH+ ions stating whether there is a lot or a little in
Ierofanga [76]

Answer and explanation;

-Strong acids and bases are defined as compounds that completely ionize in water or aqueous solution. Weak acids and bases only partially dissociate.

A strong acid will fully dissociate in water to form H+ ions.

HCl + H2O---> H3O+ + Cl-  

This reaction is non-reversible. After dissolution, only a very very minute concentration of HCl itself remains in the solution, as most of the diluted HCl  has dissolved into ions.


Ka = [H+] [Cl-] / [HCl]

The same applied for bases. The only difference is that the base dissociates to form OH- ions instead.

Strong and weak bases will depend likewise on whether the reaction is reversible.

A strong base will completely dissociate to give more OH- ions.

An example of a strong base;

NaOH + H2O ---> Na+ + OH- + H2O


Kb = [Na+] [OH-] / [NaOH]

4 0
3 years ago
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