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Charra [1.4K]
3 years ago
5

Which period belongs to the Paleozoic era and not the Cenozoic era?

Biology
2 answers:
Verdich [7]3 years ago
8 0

Answer:

A the answer is A

Explanation:

VARVARA [1.3K]3 years ago
4 0
The correct answer is - Devonian

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Which methods is utilized by eukaryotes to control their gene expression that is different from the type of control found in bac
Damm [24]

Answer:

Method which is utilized by eukaryotes to control their gene expression that is different from the type of control found in bacteria is control of both RNA splicing and chromatin remodeling.

Explanation:

There is a difference in the gene expression of the prokaryotes and eukaryotes. In prokaryotes, transcription and translation occur simultaneously in the cytoplasm, and gene regulation occurs at the transcriptional level. In eukaryotes gene expression is regulated during transcription and RNA processing, which take place in the nucleus, and during protein translation, which takes place in the cytoplasm.

Prokaryotic cells can only regulate gene expression by controlling the amount of transcription. As eukaryotic cells evolved, the complexity of the control of gene expression increased. For example, with the evolution of eukaryotic cells came compartmentalization of important cellular components and cellular processes. A nuclear region that contains the DNA was formed. Transcription and translation were physically separated into two different cellular compartments. It therefore became possible to control gene expression by regulating transcription in the nucleus, and also by controlling the RNA levels and protein translation present outside the nucleus.

5 0
3 years ago
During a discussion about ecosystems, a student says, "Plants eat sunlight, and animals eat other organisms." Which of the follo
GuDViN [60]

Answer:

The answer is B.

Explanation:

Plants are able to convert sunlight by using photosynthesis. Photosynthesis allows them to use sunlight to convert water and carbon dioxide into into glucose, which is sugar.

7 0
3 years ago
A community only refers to a group of biotic factors.<br><br> True or False
Olegator [25]

Answer: The statement is false

Explanation:

A community refers to a group of plants and animals that occupy a given area and can adapt to the conditions of their environment. Hence, community include biotic factors (living organisms) and abiotic factors (non-living factors like soil, weather etc).

Thus, the statement is false

7 0
3 years ago
Read 2 more answers
A normal chromosome and its homolog carrying an inversion are given. the dot (•) represents the centromere. normal: a b c • d e
kotegsom [21]

The type of inversion is Paracentric inversion.

There are two types of inversion at the chromosome level, depending on the centromere:

Paracentric inversions:

the centromere is not included in the inversion.

Pericentric inversions:

The centromere is included in the inversion which can transform a metacentric chromosome into an acrocentric chromosome.

the structure that will form during synapsis is inversion loop.

These inversions are balanced rearrangements but at the moment of meiosis they cause difficulties in pairing. There is most often formation of a pairing loop. The occurrence of recombination in the inverted segment causes the formation of abnormal gametes by duplication / impairment.

4 0
3 years ago
The value of ∆G for a chemical reaction taking place in an organism is −255 kJ. Which of the following best describes how this w
Sladkaya [172]

Answer:

D. The reaction will release energy the organism can use to do work.

Explanation:

A negative ∆G means that the products have less free energy than their reactants. This energy had to go somewhere, it can't just disappear. That means that 255kJ of energy was released, turning into free energy for the organism to use for work.  

3 0
3 years ago
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