BIOLOGY HIGH SCHOOL

Write this number to two significant figures in scientific notation. Use the "^" character to indicate the exponent.5,489.6654

Answers

Answer 1
Answer: Converting a number to its scientific notation with two significant figures gives 5.5x10^3. Scientific notation is used to denote large or complicated numbers more easily. It basically involves shortening the number by moving the decimal point. A "10^n" is then included to make sure that the number is still the same. Sometimes, writing the scientific notation also requires rounding off the number.

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What are two ways in which heat is transported in the biosphere?

Answers

The answer is by both convection and radiation. Direct sunlight penetrates to the surface, heating air particles and the ground and water. As these particles/molecules heat up, the heat spreads around AND rises. What does this have to do with the biosphere, you ask? Organisms are directly warmed by sunlight, and each other (consumers) to stay warm as well. Please give me "best answer"!

Diatoms have cell walls composed of _____.a. silicon dioxide
b. carbon dioxide
c. chitin

Answers

The correct answer is a - silicon dioxide.

Diatoms are single celled algae. They have a silica - based cell wall called a frustule, which gives each diatom a particular shape.

Diatoms exist as separate single cells although some may be found in groups or colonies. The ones found in colonies create very pretty forms: leaf shaped, oval , star and even like a period.

Outer shells of diatoms are quite valuable. They are used in industry in the manufacture of toothpaste to give it grit.

Answer:

Diatoms have cell walls composed of silicon dioxide.

Which of the following is most likely an example of genetic drift resulting from the founder effect? a. The species’ physical habitat is limited. b. The population expresses a mix of dominant and recessive traits. c. The species occupies a small, specific niche. d. A population commonly expresses traits that are otherwise rare in the species.

Answers

An example of genetic drift resulting from the founder effect, of the available answers listed below, would most likely be a situation in which a population commonly expresses traits that are otherwise rare in the species. An example of this might be an animal with longer limbs than other members of the same species - there have been real-life examples of this studied with lizards.

The person above is basically saying D

What is the difference between static and current electricity? give an example of each

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Static Electricity - the word static means 'at rest' - this kind of electricity exists when objects separated by an insulator has a build up of opposite charges. Because the attraction between these charges is so strong, they can flow even through great insulators. Ex: lightning, friction

Current Electricity - it makes electronic devices possible. There is a constant flow of charges in this type of electricity. In contrast to static electricity, current electricity is changing, dynamic and always on the move. Ex: starting a car, watching TV, using an electric stove.

Complete this sentence: Most living things use ____________ to make ____________ from glucose.a. oxygen, NAD+
b. ATP, oxygen
c. oxygen, ATP
d. NADH, NAD+

Answers

Living organisms undergo vital processes such as respiration, excretion, digestion, and reproduction to survive.

Respiration in Living Beings

  • Respiration is the breakdown of sugar molecules in the presence or absence of oxygen to yield ATP.

  • Repatriation is a series of reactions in aerobically respiring organisms, such as glycolysis, Kreb's cycle, and oxidative phosphorylation with electron transport chain.

  • In respiration, most living organisms use oxygen to make energy or ATP from glucose.

Thus, the living organisms who respire aerobically use oxygen to break down glucose and release ATP molecules.

Learn more about Respiration here:

brainly.com/question/1439976
THE ANSWER IS C:  oxygen, ATP

Jill stepped on a tack. Which part of the central nervous system caused her foot to move off the tack quickly in a reflex response?

Answers

The danger receptor is called nociceptor; this signals the brain to pull the injured part away from danger. Signal travels to the posterior or dorsal horn of spinal cord.

Answer: spinal cord

Explanation:
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