BIOLOGY HIGH SCHOOL

What is a limitation of using electron microscopes to view specimens? (2 points)

Answers

Answer 1
Answer:

Answer:

The electron microscope uses electrons to form images for this reason does not allow to observe living cells because they need to work in a high vacuum atmosphere, the samples require preparation through a long fixation process, which means that it is not possible to observe living cells. To observe a cell with this microscope, dead cells must be observed, after being fixed and stained with heavy metal ions.

In these microscopes it is not possible to observe the cells carrying out their normal behaviors (for example, migrating or dividing) under the microscope
Answer 2
Answer: The correct answer is C. You cannot view live specimens because the necessary preparation kills cells. 

The answer is pretty self-explanatory. Unlike it, regular microscopes can view living creatures such as bacteria or similar.

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Which fat is most likely a solid at room temperature?
2.) Unlike photosynthesis, cellular respiration occurs in (1 point)A. Animal Cells Only B. Plant Cells Only C.prokaryotic cells only. D.all eukaryotic cells.

Where does aerobic cellular respiration occur within a eukaryotic cell?

Answers

cytoplasm (glycolysis) and the mitochondria (cristae and matrix)

Chemical reactions carried out by living systems depend on the ability of someorganisms to capture and use atoms from nonliving sources in the environment.
The specific subset of these reactions that break down nutrients in food can be
described as _____________.
(a) metabolic.
(b) catabolic.
(c) anabolic.
(d) biosynthetic.

Answers

Answer:

(B) Catabolic.

Explanation:

The metabolism refers to the chemical reactions which are used by the organisms to sustain their life therefore metabolism is considered a characteristic feature of the living organisms.

The metabolism involves either the formation of a molecule from the smaller subunits or monomer through a process known as anabolism and other involves the breakdown of the larger molecule into smaller subunits through catabolism.

In the given question, the breakdown of the food particle which is usually the complex biomolecules is broken down into simpler subunits through a catabolic reaction. The smaller subunits of molecules are easily absorbed ad then utilised by the body.

Thus, Option-B is the correct answer.

Information about traits is stored in the cell nucleus in a molecule called ______.

Answers

Answer:

Information about trait is stored in the DNA

Explanation:

What is DNA?

The acronym DNA stands for (Deoxy Ribonucleic Acid) . The genetic code which determines the behavioral pattern of an organism . Each nucleotide contains a sugar and a phosphate molecule, which make up the 'backbone' of DNA.

DNA because it is passed from a parent to a child during reproduction. it is made up of genes

Primary succession would occur ______________.a. In a field
b. On an island just formed by a volcanic eruption
c. in an area after a forest fire
d. all of the above

Answers

Im Pretty Sure  Its D.)

If a gas is moved from a large container to a small container but its temperature and number of moles remain the same, what would happen to the pressure of the gas?It would increase.
It would be halved.
It would stay the same.
It would slightly decrease.

Answers

The pressure would increase. This can be explained by the ideal gas law where for an ideal gas its pressure, volume and temperature is a function of each other ans is expressed by an equation: PV = nRT. We first need to assume that this gas given is ideal. When the temperature and the number of moles is set to a constant value while the volume decreases, we can see that from the equation pressure and volume are indirectly proportional to each other, therefore as the volume decreases, the pressure inside increases.

Answer:

It would increase

Explanation:

Was right on edge

Select all that apply.Which of the following animals filter feeds?

dolphins
fish
baleen whales
clams
sponges

Answers

Animals that filter feeds are called filter feeder. These are a sub-group of feeding animals that eat by filtering the food from water. They use a specialized filtering system from their body to filter their food. Filter feeders are important in cleaning the water. Examples of these are baleen whales, clams, sponges and some fishes. Thus, all are animals which filter feeds except dolphins.
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