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Readme [11.4K]
2 years ago
14

Lucia was looking at cells with a microscope. She knows that the cells are classified as either plant cells or animal cells. How

can she confirm that these cells are plant cells? she should look for a cell membrane surrounding the entire cell. She should look for a cell wall outside of the cell membrane. She should look for a small vacuole in the center of the cells. She should look for a cytoplasm that contains lysosomes.
Biology
1 answer:
Allushta [10]2 years ago
3 0

Answer:

She should look for a cell wall outside the cell membrane.

Explanation:

You might be interested in
GUYS PLSS HELP if you know!!! ASAP!!
inessss [21]

Answer:

your answer is positive b

4 0
3 years ago
Read 2 more answers
If your blood becomes too diluted, what will happen to the red blood cells?
kifflom [539]

Answer:

The red blood cells will burst or rupture when it is diluted and it will be one transparent and visible.

Explanation:

This is because when red blood cells are in water or become too diluted,water will enter the red blood cells through the process of osmosis. Because water is an hypotonic solution, water from outside of the cell to the inside making the cells to continue to swell up and rupture ,a phenomenon known as haemylosis. When the red blood cells rupture, it loses haemoglobin and it's become transparent and visible.

8 0
3 years ago
Question 4 .Which process is a physical change?
ohaa [14]

Explanation:

Which process is a physical change?

c. melting ice

If you break a piece of glass, the shape of the glass changes, but the properties in the fragments remain the same. Which of the following has occurred?

d. a physical change

A substance made up of two or more elements that have been chemically combined is called

c. a compound

Of the three ordinary states of matter, gas is the only state that

c. is highly compressible

In which state of matter do the particles have the most energy?

b. gas

Elements in group 18 called Noble Gases are highly reactive because they have 1 valence electron.

false

Atomic mass is the sum of

b. protons and neutrons

The current model of the atom is known as

a. Rutherford's model

Most elements on the periodic table are

d. metals

Which is not a quality of a non-metal?

a. shiny

Hope this helps.

3 0
3 years ago
Lipid
Daniel [21]
The answer is A) Carbon
Hope this helps.
5 0
3 years ago
Read 2 more answers
Boris Magasanik collected data on the proportion of each base in RNA from different species. To compare the relative amount of e
just olya [345]

Answer:

The nucleic acid is a macromolecule present in living systems in the form of either DNA or RNA, whose molecule consists of many nucleotides which are linked with each other to form long chains. The presence of DNA or RNA in an individual promotes continuity of life. The variability and complexity of nucleic acid are dependent on its constituent molecules as, sugar, a phosphate group, and a nitrogenous base. However, two monocyclic nitrogenous bases were classified purines (adenine:A, guanine:G) and pyrimidines (thymine:T, cytosine:C, and uracil:U).

In addition, RNA is a single-stranded structure which differs from DNA in two aspects, the sugar content of RNA is ribose, and pyrimidine base uracil replaces the thymine base of DNA. A ratio between two strands of DNA can be calculated by using Chargrff's rule which states that "DNA from any cell of all organisms possess a 1:1 ratio (base Pair Rule) of pyrimidine and purine bases'.

The purine to pyrimidine ratio in RNA with different bases is given below in the following table:

Presence of single strand in RNA does not follow chargaff's rule and alters the purine: pyrimidine ratio. The above ratio of each base in the given information is not equal, due to which the ratio of purines to pyrimidines is different. The ratio of DNA and RNA is not equal because DNA has its complementary DNA strand. However, bases in RNA might vary due to its single-strandedness property, but its ratio is dependent on the species.

Therefore, it can be concluded that the ratio of purines to pyrimidines is dependent on the species due to its genetic makeup. Hence, option (c) is correct.

7 0
2 years ago
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