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frez [133]
4 years ago
8

PLZ ANSWER SOON What did J.J. Thomson’s experiments with cathode-ray tubes imply about the mass of an electron?

Biology
1 answer:
vovikov84 [41]4 years ago
6 0

Answer:

Electrons are many thousand times smaller than the nucleus and negatively charged.

Explanation:

Electrons possess negligible mass and carry a negative charge.

If you would like FREE tutoring in chemistry or another subject, check out www.growthinyouth.org.

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If a population of four o’clock flowers consists of five RR plants (red flowers), two Rr plants (pink flowers), and one rr plant
vladimir1956 [14]

Answer: option B) 0.25

Explanation:

Total population of four o’clock flowers = 8

Number of red flowers with RR phenotype = 5

Number of pink flowers with Rr phenotype = 2

Number of white flower with rr phenotype = 1

To obtain the phenotype frequency of plants with pink flowers:

put the number or Rr phenotype OVER the total population of four o'clock plants

i.e 2/8

= 0.25

Therefore, 0.25 is the answer

3 0
3 years ago
What is an endotherm? how do sweating, fur, and feathers affect the body temperatures of endotherms?
Anton [14]
<span>1. What is an endotherm?
Endotherm is an animal that keeps their temperature constant in a certain range. Keeping temperature is important because most enzyme has an optimal working range. By keeping the temperature at optimal range for the enzyme, the organism can do metabolism more efficient.


2. how do sweating, fur, and feathers affect the body temperatures of endotherms?
The environments temperature should influence the temperature of an organism that lives within it. </span>Endotherms need to control their temperature, so they have some mechanism to increase/decrease the body temperature. or to insulate themselves from the environment.
Sweating help decreasing temperature makes the organism can withstand hot environment. Fur and feather will insulate the body, makes the organism more resistant to cold.<span>

</span>
7 0
3 years ago
Which of the following best describes how a cell’s DNA can change through mutations?
sladkih [1.3K]
The right answer would be D.

6 0
4 years ago
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Many fish use the way they look to communicate. What feature makes the queen angelfish in the picture easy for other queen angel
podryga [215]

Answer:

i think it’s C

Explanation:

4 0
3 years ago
Which organisms develop gills from pharyngeal arches and later develop lungs to breathe on land? Frog Scallop Salamander Scorpio
Sladkaya [172]

Answer:

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Explanation:

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4 years ago
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