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
Rama09 [41]
3 years ago
10

When technological advancement was necessary before scientists could begin to observe cells

Biology
2 answers:
stepan [7]3 years ago
5 0

Oh boy. I think it was the microscope or the earlier version of that.

kifflom [539]3 years ago
3 0

Cells are the tiniest structural and functional unit of a living organism. They consist of nucleus and cytoplasm that are enclosed in a membrane. The cells are invisible to the naked eye and hence a microscope was needed to observe them. Robert Hooke was the first scientist to observe them under the microscope.

You might be interested in
22) Phosphorus and sulfur are returned to the soil primarily by the actions of
Fudgin [204]
I believe the answer is decomposers. Does that make sense in the context of what you have learned in class? If you look up "the circle of phosphorous," you can see images that show that decomposers, like fungi and microbes break down dead animals and plants using some of their phosphorous, but what isn't used is returned to the soil. The same can be said for sulfur. Decomposers like fungi and bacteria break down dead plants and animals and return sulfur to the soil. 

I want to warn you that there is a slight possibility that I might be incorrect. I am still pretty sure I am right. The only thing that makes me question the correctness of my answer is another brainily question I saw when i was looking up this stuff. Two people had responded to that Middle schoolers question and had said the answer was producers. They didn't give any explanation for their answers. So, I am confused as to how they both got the same answer that was different from mine.  No material that I have seen regarding either the phosphorous cycle or sulfur cycle has shown plants as RETURNING the most sulfur and phosphorous into the soil. Usually, it has been depicted that producers, such as plants, UTILIZE the most phosphorous and Sulfur from the soil.
5 0
3 years ago
There are different types of nerves or mechanoreceptors located in your skin. Nerves that detect deep pressure are called _____.
UNO [17]

Nerves that detect deep pressure are called Pacinian corpuscles.

Pacinian corpuscles are microscopic onion-shaped nerve structures that are situated in the dermis and hypodermis. Pacinian corpuscles detect deep pressure and vibration. This nerve has a myelinated nerve ending in the middle of its structure and the external layer contains flattened cells, a lymph-like fluid and collagen fibers. The structure of pacinian corpuscles provides a fast response and rapid recovery by transmitting fast events. This make them sensitive to pressure and vibration.


7 0
3 years ago
Read 2 more answers
Which is the first type of cell to differentiate?
pantera1 [17]

Answer:

blood cell

Explanation:

6 0
3 years ago
А
PIT_PIT [208]
Transport protein cytoskeleton microtubule
6 0
3 years ago
How do the systems in the human body help regulate the internal environment?
QveST [7]

Answer: The nervous system controls virtually all body activities, and the endocrine system secretes hormones that regulate these activities.

Explanation:

6 0
2 years ago
Other questions:
  • The idea that sporophyte and gametophyte generations follow one another in a plant's life cycle is called
    15·2 answers
  • In Earth’s water cycle, evaporation takes place as solid ice and snow are converted to water vapor.
    5·1 answer
  • An abiotic factor affecting the behavior and survival of such organisms as robins and violets is the
    6·1 answer
  • What do you know regarding ischemia that is confined to only the posterior and or lateral segments of the left ventricle?
    9·1 answer
  • Which is the best word for rowdy and disorderly
    13·2 answers
  • John has repeatedly been taking a painkiller for his back pain. one day, his doctor instead gives him a different pill, which co
    12·1 answer
  • Converting uranium to thorium by decreasing the number of protons from 92 to 90 and decreasing the number of neutrons from 146 t
    7·1 answer
  • What event starts the Krebs Cycle?
    7·2 answers
  • SOMEONE ANSWER ASAP!!!!
    15·2 answers
  • Please answer!!! This is due by tomorrow
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!