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
Nezavi [6.7K]
3 years ago
10

What technological advancement was necessary before scientists could begin to observe cells? A. invention of the microscope B. i

nvention of the balance C. invention of the telescope D. invention of the thermometer
Biology
2 answers:
hammer [34]3 years ago
6 0

the correct answer would be

A) invention of the microscope

Flura [38]3 years ago
3 0

A : microscope will be your answer

You might be interested in
If you are really stressed out about an upcoming math test on Tuesday what type of stress is this? A: avoidance B:acute C:chroni
Kobotan [32]

Some students feel distressed only in test situations. They might be said to suffer from Acute Stress.

Answer: Option B

<u>Explanation:</u>

Stress is your body's reaction to specific circumstances. It's abstract, so something that is distressing for you may not be unpleasant for another person. There is a wide range of sorts of stress and not every one of them is terrible. Stress can enable you to act rapidly in a crisis or help you comply with a time constraint.

Acute stress is the most widely recognized sort of pressure. It's your body's prompt response to another test, occasion, or request, and it triggers your battle or flight reaction.

5 0
3 years ago
if the following graph represents the decay of strontium-90 in an igneous rock, what event occurred at 0 years on the horizontal
kodGreya [7K]

Answer:

At 0 years, an event took place which is known as metamorphosis of igneous rock i.e., formation of igneous rocks from melted magma.

Strontium-90 is a radioactive element which undergoes beta decay to form yttrium-90. It has a half life of approximately 28 years and decay energy of 0.546 MeV. This radioactivity is used by geologist to estimate the age of the rock, fossils, meteorites etc. Other radioactive elements used by the geologists are carbon-40, potassium-40 etc.

Radiometric clock is set when the rock was formed in the past i.e., the moment when an ingenious rock was solidified from molten magma.

7 0
3 years ago
Read 2 more answers
Georgio is jogging barefoot along the beach when he suddenly steps on the sharp edge of a broken shell. he instantly feels pain
ikadub [295]
<span>Georgio instantly feels pain due to the message carried to his brain by </span>myelinated axons.  The message of the ache is carried by unmyelinated axons.
The myelinated axon is highly "insulated" axon that r<span>eceives input and transmit impulse quickly.</span>
The purpose of the naked axon with larger dendritic field which is called unmyelinated axon is to receive as much input as possible.

6 0
3 years ago
Plzzzzzzzzz help e.e
katrin [286]

Rain is expected in Billings is the correct answer

4 0
3 years ago
Read 2 more answers
How does cohesion and adhesion differ?
alisha [4.7K]
Cohesion is the property of like molecules to stick to each when they have a mutual attraction 

Adhesion is the property of different molecules or surfaces to stick to each other 

7 0
3 years ago
Other questions:
  • ___________ energy refers to energy sources (such as solar, wind, and hydroelectric) that release very small amounts of greenhou
    8·2 answers
  • On a topographic map, the elavation of an area with contour lines that are very far apart is _______.
    10·2 answers
  • Obstruction of the flow of lymph in lymphatic vessels can lead to an accumulation of interstitial fluid in the tissues. This con
    9·1 answer
  • Answer the following 2
    11·2 answers
  • What is true of carbon atoms?
    12·1 answer
  • How do living things store their energy ?
    11·1 answer
  • predict the likely effect on the ability of substance L to enter the cells if substance L is attached to a large protein
    8·1 answer
  • Which of these organisms can make glucose?
    12·1 answer
  • Fruit production in anthophytes develops from: a. a female reproductive structure b. a male reproductive structure c. both male
    5·1 answer
  • I NEED HELP!!!!<br> PLEASE READ THE QUEUSTION AND AWNSER IT'S A MULTI ANSWER.
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!