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Sveta_85 [38]
3 years ago
7

The existence of the gene established by which of the following?

Biology
1 answer:
mrs_skeptik [129]3 years ago
8 0

Answer:

Wilhelm Johannsen.

Explanation:

Gene may be defined as the functional segment of DNA that are heritable in nature. Genes are responsible for the formation of protein product and observable characteristics of the organisms.

The Danish botanist, Wilhelm Johannsen coined the term gene. He explained the existence of the gene by the pure line experiments of the genetics. The term gene was established in opposite to the panegenes.

Thus, the correct answer is option (d).

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The insertion of a tube through the urethra and into the bladder is called
Vinvika [58]
This is called a urinary catheterization.
8 0
3 years ago
What would be the best explanation for why myelinated fibers conduct signals faster than unmyelinated fibers?
Sliva [168]

Answer: The diffusion of ions along the axoplasm is faster,in myelinated compare to unmyelinated,

Neurons are the structural and functioning units of nervous system.They are the vehicles for transmission of impulses as electrical signals from one part of the cells,and from one part of the body to another.

The basic structural components of a typical neuron are the cellbody, the axon, and the dendrites.

Based on structure neurons are classified as myelinated and unmyelinated.This is based on the the surrounding layer of myelin sheath around the axon. The myelin provides the insulating layer for the axon.And ensures fast movement of impluses.

In myelinated neurons the myelin sheath are interrupted at intervals by gaps along the length of the axon called Nodes of Ranvier. These gaps contains more Na-K channels for influx and out-flux of K and Na+ ions for transmission of impulses.

The cytoplasm of axon is called axoplasm,Since this is surrounded by myelin sheath which contains Na-K+ channels,The rate of diffusion of ions along  these channels is faster for depolarization to take place than in unmyelinated neurons. Inaddtion as these ions  diffusion increases,its jump faster at the nodes of Ranvier (saltatory conduction) to the next axoplasm which further speed up the rate of transmission.

Unmyeinated lacks myelin sheath,therefore the exchange and  the rate of diffusion of ions along the axons is low.

Explnation:

6 0
2 years ago
When we rest immediately after completing an intense workout, our muscles will soon switch from:
natita [175]

Aerobic respiration to lactic acid fermentation, lactic acid is the reason your muscles get sore after a workout

Hope this helps.
8 0
3 years ago
Oxygenated blood reaches the fetus through the __________.
Gala2k [10]
Through the umbilical vein.
3 0
3 years ago
Transcription is:
Veronika [31]

Answer:

The synthesis of RNA from a DNA template.

Explanation:

We know that transcription is the first step in gene expression. In the transcription process, information from a gene is used to build a functional product such as a protein. The primary goal of transcription is to produce an RNA copy of a gene's from a DNA sequence.

For a protein-coding gene, the RNA copy, or transcript, carries that information that is needed to build a polypeptide.  

Eukaryotic transcripts need to go through some processing steps before starting of translation into proteins.

3 0
3 years ago
Read 2 more answers
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