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Minchanka [31]
4 years ago
13

Which of these organelles is absent in a prokaryotic cell?

Biology
1 answer:
Olin [163]4 years ago
7 0

all membrane bound organelles are absent in prokaryotic cells. They only have a membrane, cytoplasm, DNA and ribosomes(and also some sort of a cytoskeleton that helps with division and cell shape)

Hope this helps

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3 years ago
What damaging byproduct resulted from organisms that began to use photosynthesis? 
Firlakuza [10]
Oxygen.

Oxygen was fatal when organisms started using photosynthesis, this event was known as the Great Oxidation Event.
4 0
2 years ago
when DNA mutations occur they can have a variety of effects on an organism if the DNA is TAC CGA ACC TTA create a mRNA strand wi
lara31 [8.8K]

Answer: AUG GU UGG AAU

Explanation: Since it's a point mutation which only effects single nucleotide; so in CGA codon, the second codon, deletion mutation has been occured while mRna strand is going to be synthesized, this has shortened the length of the resulting protein developed from these codons.

Since RNA contains uracil instead of thymine, so in place of thymine (T), uracil has been placed.

7 0
3 years ago
Some plants have stems called
inna [77]

Answer:

Runners

Explanation:

stems are usually upright and prop up the plant to gather sunlight, however, some stems grow along the ground. These stems are called runners and the plant itself is called a stolon. Runners are involved in asexual reproduction of plants. They have nodes along them which can grow into another plant.

8 0
3 years ago
Read 2 more answers
When natural sources of ionizing radiation become increased because of accidental or deliberate human actions such as mining, th
MatroZZZ [7]

The question is incomplete as it does not have the options which are:

artificial

enhanced natural

extraterrestrial

manmade

Answer:

Enhanced natural resources

Explanation:

Natural resources are the resources used by the humans for survival present in the environment or provided by the surrounding environment.The natural resources includes the wood, gas, air, water and other substances.

The substances which emits harmful radiations like radium, thorium, uranium are known as radioactive isotopes.

When these ionizing radiation emitting natural substances increases in the environment due to human activities like the particle accelerators, X-rays and other methods which produces these substances then these substances are refereed to as the enhanced natural substances.

Thus, Enhanced natural resources is the correct answer.

6 0
3 years ago
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