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Alisiya [41]
3 years ago
8

Which of the following correctly describes how nerve impulses move throughout the body?

Biology
1 answer:
ikadub [295]3 years ago
7 0
The correct options are as follows:
1. ELECTRICAL TRANSMISSION THROUGH NEURONS AND CHEMICAL TRANSMISSION BETWEEN NEURONS [D].
Neurons, which are the nerve cells that carry nerve impulses are made up of cell body and dendrites. Electrical events propagate signals within a neuron and chemical processes transmit the signals from one neuron to the other.
2. SENSORY NEURON - BRAIN - SPINAL CORD - MOTOR NEURONS [B].
Waking up from sleep involves sensory neurons. Hearing of a strange sound is made possible by the activity of the brain. The man become alarm as a result of the message to the body from the brain via the spinal cord and running  involves motor neurons.
3. MOTOR NEURONS AND SENSORY NEURONS [A].
The peripheral nervous system is one of the two components of the nervous system and is made up of the nerves and the ganglia outside the brain and the spinal cord. The neurons of the peripheral nervous system is made up of sensory and motor neurons. The sensory neurons bring signals to the central nervous system while the motor neurons carry signals out of the central nervous system.
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Random changes in allele frequency in a population are called:
kogti [31]
Random changes in allele frequency in a population are usually called genetic drift. The reason why this is the answer is because it is a very specific word which is used to describe exactly that - random changes in allele frequency. 

All the other cases; answers, here aren't correct and don't apply. 
8 0
3 years ago
Which of the following statements is NOT true of mitosis?
svlad2 [7]
A is the correct answer
4 0
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Agribusiness is the concept of small farms selling crops each year to earn a meager living.
Oliga [24]
False. Agribusiness is agriculture conducted on a large, commercial scale.
3 0
3 years ago
Please help me, I need this ASAP!
AveGali [126]
Prophase I
The chromosomes condense, and the nuclear envelope breaks down & crossing-over occurs.

Metaphase I
Pairs of homologous chromosomes move to the equator of the cell.

Anaphase I
Homologous chrmosomes move to the oppisite poles of the cell.


Telophase I and Cytokinesis
Chromosomes gather at the poles of the cells & the cytoplasm divides.

Prophase II
A new spidle forms around the chromosomes.

Metaphase II
Chromosomes line up at the equator.

Anaphase II
Centromeres divides & chromatids move to the opposite poles of the cells.

Telophase II and Cytokinesis
A nuclear envelope forms around each set of chromosomes & the cytoplasm divides.
8 0
3 years ago
Question 6 You cross a true-breeding red-flowered snapdragon with a true-breeding white-flowered one. All of the FI are pink. Wh
muminat

Answer:

E (Red shows incomplete dominance over white)

Explanation:

This portrays a monohybrid cross involving a single gene coding for flower colour in snapdragon plants. According to the question, a purebreeding red flowered (homozygous) plant is crossed with a purebreeding white flowered (homozygous) plant to produce an all pink flowered offspring. This phenomenon is called INCOMPLETE DOMINANCE.

Mendel, in his experiments, discovered that an allele can mask the expression of another in a heterozygous state. He called the allele that masks DOMINANT allele while the allele that is masked RECESSIVE allele. However, exceptions like INCOMPLETE DOMINANCE, has occurred in the sense that an allele does not completely mask the expression of its allelic pair, instead an intermediate phenotype, which is a combination/blending of both parental phenotypes is produced.

In this case, the red flowered snapdragon (RR) does not completely cover up the expression of white flower (rr), hence a hybrid/heterozygous offspring is produced that combines the phenotypic characteristics of both parents to form an intermediate flower colour (pink). Hence, it can be said that Red flower is incompletely dominant over white flower or no allele/trait is dominant or recessive to another.

3 0
3 years ago
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