1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Diano4ka-milaya [45]
3 years ago
5

Calculate the actual size of a cell which has an image size of 2.5cm viewed at a magnication of x400.

Biology
1 answer:
san4es73 [151]3 years ago
7 0

Answer:

It is not possible to determine the actual size of the cell without a scale viewed under that same magnification. As a scale for microscopy, a ruler should be placed under the microscope and the microscope lens units should be compared with that of the ruler to obtain the scale. (1cm on the ruler= ? microscope lens units). The microscope lens units can then be used to measure the length of the cell and the actual length of the cell can be obtained under that magnification.

You might be interested in
What was one biome you learned about today? Include one key characteristic<br> about this biome.
ra1l [238]

Answer: One biome I learned would be the desert biome and how there are oasis and other things you can find there, etc...

Explanation:

6 0
3 years ago
What does a cell need in order to get energy?
S_A_V [24]

Answer:

The cell needs food in order to get energy.

Explanation:

Hope this helps!

If not, I am sorry.

4 0
3 years ago
Some cancers are caused by mutations that stop certain proteins from working. The inactivation of whát kind or protein could lea
77julia77 [94]

Answer:

The inactivation of one protein that slow down the cell cycle could lead to cancer. (option b).

Explanation:

The cell cycle is the process a cell undergoes when it divides during its life. This process includes a control mechanism to prevent normal cells from replicating more than normal, called cell cycle regulation.

In oncogenesis - the formation of malignant tumours - many factors induce the abnormal growth of a tissue by the abnormal multiplication of the cells that form it, leading to cancer. One of these factors may be a mutation in the DNA that prevents the production of regulatory proteins.

The mutation that produces exaggerated cell growth -and which can eventually lead to cancer- can create defects in a specific regulatory protein that slow down the cell cycle, so that exaggerated and uncontrolled cell replication occurs.

Once a tumor tissue has formed, successive mutations will lead to a lack of cell differentiation, the property of forming blood vessels, the ability to invade tissue and lose its apoptosis mechanism, that characterizes cancer cells.

Learn more:

Cyclines in cell cycle regulation brainly.com/question/6821354

3 0
3 years ago
Some bacteria are propelled by biological motors that spin hair-like flagella. A typical bacterial motor turning at a constant a
koban [17]

Answer:

Angular speed of the bacteria motor is 1447rad/s

t = 4.342 × 10^-3 seconds

Explanation:

Hint: Do you remember circular motion in physics???

Okay, let's go

Given:

radius of 1.61 10-8 m

tangential speed at the rim of 2.33 10-5 m/s

Let's recall that angular velocity

ω = Vt/r

Where,

Vt = 2.33 10-5 m/s

r = 1.61 10-8 m

ω = ?

ω = 2.33 ×10-5 m/s = 1447rad/s

1.61 ×10-8 m

Angular speed of the bacteria motor is 1447rad/s

Let's find the elapsed time too

Since The angular velocity is said to be constant, there will be no acceleration (a = 0)

Using:

θ = ωot + (1/2at^2)

t = θ/ωo

(θ = 1 revolution or 2π rad, ωo = 1447rad/s)

t = (2π rad)/(1447 rad/s)

t = 4.342 × 10^-3 seconds

8 0
3 years ago
Who puts CO2 back into the atmosphere?
STALIN [3.7K]

Answer:

Humans/Animals

Explanation:

Humans breathe in oxygen but when it comes back out it comes through as carbon dioxide. Plants are the exact opposite.

5 0
3 years ago
Other questions:
  • Finish this sentence: in areas where there is an increased amount of pedestrian activity, it is important to
    8·1 answer
  • 1) Nematodes exhibit the constant cell number called? ............................
    12·1 answer
  • Whether sugar molecules provide all the elements needed to make the four types of macromolecules.
    9·1 answer
  • Which of the following adaptations would you expect to find in an animal in the taiga biome, but not in the alpine? a. hibernati
    7·1 answer
  • The illustration below shows two waves. Each wave travels in the same amount of time.
    10·1 answer
  • A plant's water supply is now deeper in the ground.
    14·1 answer
  • Can someone please help!!!!
    12·1 answer
  • Explain the lytic and lysogenis cycle in viruses.<br>​
    10·1 answer
  • Describe the movement of the tectonic plates in model D. What is this situation called?
    14·1 answer
  • Environment: Clean Forest
    13·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!