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nikdorinn [45]
3 years ago
12

Prokaryotic cells lack a nucleus. Therefore, the genes in prokaryotic cells are:

Biology
1 answer:
frutty [35]3 years ago
6 0

Answer:

d) B and C are both true            

Explanation:

Prokaryotic cells: The term "prokaryotic cells" are described as cells that don't consist of "membrane-bound organelles" or "true nucleus". However, the organisms that come under the domain of Archaea and bacteria tend to possess prokaryotic cells and it has been described that organisms that consist of prokaryotic cells are abundant in nature and make most of the Earth Biomass. Prokaryotic cells don't possess the nucleus rather have one chromosome.

In the question above, the correct answer is option D.

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HELP ASAP I WILL GIVE BRAINLIST
adelina 88 [10]

Answer:

1) CO₂

2) 0.2551 g

Explanation:

The balanced reactions are:

CaCO₃ + 2HCl → CaCl₂ + H₂O + CO₂

MgCO₃ + 2HCl → MgCl₂ + H₂O + CO₂

1) The gas produced is CO₂.

2) Calculate mass of CaCO₃:

(0.5236 g) (0.4230) = 0.2215 g CaCO₃

Convert to moles:

(0.2215 g CaCO₃) (1 mol / 100.1 g) = 0.002213 mol CaCO₃

Find moles of CaCO₃:

(0.002213 mol CaCO₃) (1 mol CO₂ / mol CaCO₃) = 0.002213 mol CO₂

Convert to mass:

(0.002213 mol CO₂) (44.01 g / mol) = 0.09738 g CO₂

Calculate mass of MgCO₃:

(0.5236 g) (0.5770) = 0.3021 g MgCO₃

Convert to moles:

(0.3021 g MgCO₃) (1 mol / 84.31 g) = 0.003583 mol MgCO₃

Find moles of MgCO₃:

(0.003583 mol MgCO₃) (1 mol CO₂ / mol MgCO₃) = 0.003583 mol CO₂

Convert to mass:

(0.003583 mol CO₂) (44.01 g / mol) = 0.1577 g CO₂

Total mass of CO₂:

0.09738 g CO₂ + 0.1577 g CO₂ = 0.2551 g CO₂

8 0
3 years ago
_____ provide connections between neurons and blood vessels.
Mnenie [13.5K]
It might be an astrocyte, but I'm not sure.
7 0
3 years ago
A mineral that contains a useful substance or element, such as iron or aluminum, is a(n):
mariarad [96]
<span>A mineral that contains a useful substance or element, such as iron or aluminum, is an ore. Like gold or silver. Hope this helps!!!!! Please mark brainiest. </span>
3 0
3 years ago
Read 2 more answers
The 3-dimensional structure of a protein polypeptide chain or chains may be locked in place by other stronger bonds. These bonds
adell [148]

Answer:

NH2 group combines with COOH group to form CONH group after releasing water  

Explanation:

A peptide bond is formed between two R groups of amino acids by eliminating a molecule of water. If two amino acid joins, then a dipeptide link is formed. When three amino acid joins, then a tripeptide link is formed. And in case when many amino acid joins, then a polypeptide link is formed. A protein chain usually has several amino acid residues ranging from 50 to 2000 in numbers. Since a polypeptide chain is formed after the removal of water , it is known as amino acid residues.  

Generally , NH2 group combines with COOH group to form CONH group after releasing water  

4 0
3 years ago
Which space station was the first to involve several countries working together?
beks73 [17]

Answer:international space station

Explanation:

It’s in the name

5 0
3 years ago
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