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Semenov [28]
3 years ago
14

What cellular structures can be observed with the aid of light microscopy and electron microscopy?​

Biology
1 answer:
Serjik [45]3 years ago
8 0

With a light microscope one can view the nucleus and endoplasmic reticulum, large vacuoles etc

The resolution of a light microscope is dependent on the wavelength of light that is the main beam of illumination. Light has approximately 0.4 um (UV)- 0.7um (Infrared) wavelength. Organelles smaller than about 0.5 um will be difficult to discern with a light microscope.

With an electron microscope one can view, in addition, even the ribosomes and mitochondria, chromosomes, tubules etc.

An electron microscope can discern very minute details of a cell. This is because its resolution is dependent on the very small wavelength of a beam of electrons which is approximately 0.002 um (about 10,000 times powerful than a light microscope)

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What element did you find to have the same atomic number as day?
pav-90 [236]

Answer:

aluminum

Explanation:

4 0
3 years ago
Water is a unique compound with properties which are elemental for the existence of life. List six of these properties and how t
Luba_88 [7]

Here, we are required to list six of the properties of water and how they are essential for the existence of life.

These properties include:

  1. Water is a universal solvent
  2. Water is highly cohesive
  3. Water is a Substrate for microbial proliferation.
  4. Water supports cellular structure.
  5. Water has considerable buffering capability.
  6. Water is involved in Catabolic and Anabolic reactions.

  1. Water as a universal solvent is evident in its extensive capability to dissolve a variety of molecules and consequently transport them has earned it the designation of “universal solvent,” and it is this ability that makes water such an invaluable life-sustaining force. Biologically, water’s role as a solvent helps cells transport and use substances like oxygen or nutrients such as water-soluble vitamins.
  2. The cohesive property of water molecules helps plants take up water at their roots. Cohesion also contributes to water’s high boiling point, which is vital in animals body temperature regulation.
  3. Water serves as a substrate for Microbial proliferation because microorganisms grow best in high moisture environment.
  4. Water supports cellular structure: Water is quite important in biological structures. Water fills cells to help maintain shape and structure. The water inside many cells (including those that make up the human body) creates pressure that opposes external forces, similar to putting air in a balloon thereby creating a cushion.
  5. Water has considerable buffering capability: water buffers cells thereby protecting them from the dangerous effects of acids and bases. Highly acidic or basic substances, like bleach or hydrochloric acid, are corrosive to even the most durable biological materials.
  6. Water is involved in Catabolic and Anabolic reactions: Water is directly involved in biochemical reactions to build and break down important components of the cell. Photosynthesis, the process in plants that creates sugars for all life forms, requires water. Water also participates in building larger molecules in cells.

Read more:

brainly.com/question/24371297

5 0
3 years ago
Darwin studied actual birds on the Galapagos Islands instead of using a simulation, as you did in this lab. Studying natural sel
aalyn [17]

Answer:

Traits other than beak type might affect natural selection.

It could take many generations to observe adaptions to a population.

The environment may be complex and hard to study.

Changes in the environment may occur faster or slower than changes to the birds

The birds may be interdependent with other organisms that may change, too.

Explanation:

6 0
3 years ago
Read 2 more answers
What is the net volume of fresh air that enters the alveoli each minute, assuming that the breathing rate is 10 breaths/min, the
kondaur [170]

Answer:

6,500 mL

Explanation:

We are asked to find the total volume of air that effectively entered to the alveoli in one minute so that oxygen could be exchanged for carbon dioxide and leave the body through exhalation.

The problem says that the normal breathing rate is 10 breaths per minute, and for each breathe it takes 800 mL of air. But not all air enters the alveoli because it says there are 150 mL that are not effectively used by the alveoli. Therefore, the net amount of air used in each breathe is 800 ml - 150mL, giving us a total amount of 650 mL of air.

Now that we have the net amount of air for each breathe, we have to multiply it by the total breaths a body makes in one minute. In this case, the breathing rate is 10 breaths/min.

So, to obtain the final answer we just need to multiply the amount of net air per breathe (650 mL) times the number of breathes in one minute (10 breathes); that is 650 mL/breath x 10 breaths and gives us 6,500 mL.

7 0
3 years ago
You are on an expedition with a friend. As scientists, you are both learning about glaciers and their characteristics. You are b
Pie

Answer:

Because the red (long wavelengths) part of white light is absorbed by ice and the blue (short wavelengths) light is transmitted and scattered. The longer the path light travels in ice, the more blue it appears.

8 0
3 years ago
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