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Zielflug [23.3K]
3 years ago
6

Cell walls of bacteria (domain Bacteria) usually consist of _____________, a network of polysaccharide molecules connected by po

lypeptide cross-links.
Biology
1 answer:
Alexxandr [17]3 years ago
4 0

Answer:

the answer is Peptidoglycan

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2. Which of the following are abiotic factors in an ecosystem? (Select all that apply.)
Stella [2.4K]

Explanation:

  • light
  • minerals
  • water

those are the abiotic factors

4 0
2 years ago
If an atom has twelve electrons, how many electrons are in the n=1 energy level? how many electrons are in the n=2 energy level?
Serjik [45]

Magnesium has 12 electrons.........which wud mean that in the 1st energy level(n=1) there r 2 electrons, in the 2nd energy level(n=2) there r 8 electrons and in the 3rd energy level(n=3) there r 2 electrons.......its simple......use the formula 2n^2 where n= 1,2,3,......  

so the electron configuration of Magnesium in 2,8,2..................or more precisely 1s2, 2s2, 2p6, 3s2

8 0
3 years ago
Please help me i’ll give brainlist
Alenkasestr [34]

Answer:

I think it is B chloroplasts. Because cilia is something found in both of the cells, an same goes for mitochondria and ribsomes.

Explanation:

7 0
2 years ago
Seeds contain dense aggregates of starch. what role does water play in how the seeds use the stored starch?
jenyasd209 [6]
Water is needed to break the hydrogen bonds in the starch aggregates, allowing ready access to stored energy.
3 0
3 years ago
With increasing age comes a greater chance of a woman having been exposed to damaging environmental agents such as drugs, chemic
allsm [11]
<h2>Down Syndrome</h2>

Explanation:

Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21

  • Down syndrome is a genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21
  • Down syndrome is usually caused by an error in cell division called nondisjunction which results in an embryo with three copies of chromosome 21 instead of the usual two
  • Prior to or at conception, a pair of 21st chromosomes in either the sperm or the egg fails to separates
  • With development in embryo the extra chromosome is replicated in every cell of the body;this type of Down syndrome which accounts for 95% of cases is called trisomy 21
  • Maternal age is the only factor that has been linked to an increased chance of having a baby with Down syndrome resulting from nondisjunction;here environmental agents such as drugs, chemicals, and radiation act as mutagens which induce mutation in the fetus
5 0
3 years ago
Read 2 more answers
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