There are _____ levels of cell organization recognized by biologists.

Answers

Answer 1

Answer: There are five (5) levels of cellorganization recognized by biologists. They are cells, tissues, organs, organsystems and organisms. These are applicable to multicellular organisms thoughas they are needed for the cells to sustain their functions alone andeventually coordinating with one another. Cells are the basic unit of life, when grouped together, they aretissues. When tisuues are grouped together, they are organs and organ systems comprisesof two or more organs to function and overall, creating an organism.

Answer 2

Answer:

Answer:

there are 5

Explanation:

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The substance that gets broken down in a homogeneous mixture is the .
What does the slope of the line on this velocity versus time graph represent? A. positive deceleration B. zero acceleration C. positive acceleration D. negative acceleration
How small are the wavelengths of gamma ray radiation? A. smaller than an atom B. about the size of a golf ball C. about 10 times the size of an atom D. about the size of earth **:( thank you!!
Light can travel through a medium, but it does not require a medium.a. Trueb. False

Glare appears on a computer screen when light from the surroundings reflects off of the screen’s surface. Some computer screens have a special coating to reduce glare.Which best explains how the coating works?

A:The coating absorbs light that shines on it and prevents the light from reflecting

B:The surface of the coating is rough, so light that shines on it gets scattered in many directions.

C:The coating bends light that passes through it and prevents the light from reaching the user’s eyes

D:The surface of the coating allows light from the room to pass through but blocks the light from the screen.

Answers

Answer:

The correct answer is D.

D:The surface of the coating allows light from the room to pass through but blocks the light from the screen.

Explanation:

Glare is produced on a computer screen when light from some external source reflects on the screen.

Anti-glare coating do not absorb light to reduce glare but they actually reduce glare by encouraging the light from the room to pass through the screen so that less light is reflected. Polarized lenses absorbs light to reduce glare, not anti-glare coating.

Answer: d

Explanation:

5.25 calories are absorbed by an iron nail. How many joules is this?

Answers

1 kilo-calorie= 4184 joules
0.001 kilo-calorie= 1 calorie

therefore 5.25 calorie=21.966 joules

Answer : 5.25 Calories is equivalent to 21.966 Joules.

Explanation :

The capacity to do any work is called its energy. Its SI unit is joules. Another unit of energy is joules.

The relation between the calorie and the joule is :

$1\ calorie=4.184\ J$

To convert 5.25 calories to joules we have to use unitary method i.e.

$5.25\ calories=5.25* 4.184\ J$

So, 5.25 C = 21.966 Joules.

Hence, this is the required solution.

The doppler effect is the change in observed frequency due toa. the type of medium the wave is in
b. the type of wave
c. the original frequency of the source
d. the motion of the source or observer

Answers

d. the motion of the source or observer

I believe the answer is D, im not 100% sure though.

If the breakers at a beach are separated by 5 m and hit shore with a frequency of 0.3 Hz, at what speed are they traveling?

Answers

Wave speed = (frequency) x (wavelength)

= (0.3 Hz) x (5 m)

= 1.5 m-Hz = 1.5 m/s .

Tech A says that a battery stores electrical energy in chemical form. Tech B says that a battery creates direct current. Who is correct?

Answers

Answer:

Battery stores the electrical energy in the chemical form. When we connect it's positive and negative terminals and provide the path for the flow of electrons then it converts that chemical energy into the electrical energy and hence the direct current is created. So both of the technicians are right.

Explanation:

suppose you sit on a rotating stool, holding a big mass in each outstretched hand. if you suddenly drop the masses, will your angular velocity increase, decrease, or stay the same? explain.

Answers

Answer:

When the masses drop, they move with the same angular velocity as you before hitting the ground. i.e., they leave your hand with their angular momentum. So, in one view, you can think the mass decreases, which means the moment of inertia also decreases. Therefore, the angular velocity should increase.

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The largest mass extinction event in the history of the Earth occurred at the end of the _______ period.

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From what is known about spring tides and neap tides, you can conclude that:_________. a. the sun’s gravity exerts the most power when the moon is on the opposite side of the Earth from the sun. b. the height of high tides varies with the phases of the moon. c. spring tides and neap tides affect the phases of the moon. d. the moon revolves around the Earth every 14 days. Please select the best answer from the choices provided

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