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kvv77 [185]
2 years ago
5

Darwin hypothesized that new species could appear gradually through small changes in an ancestral species. What experiment did h

e conduct to test this hypothesis?
Biology
2 answers:
Semmy [17]2 years ago
8 0

Answer: B

<h2>the breeding of pigeons</h2>

Choices:

the breeding of finches

the breeding of pigeons

the observation of humans

the observation of dog breeds

Marianna [84]2 years ago
3 0
He watched animals in their natural habitat and started research on them. Each animal have a unique place to live and they have all different ways to survive in their habitat. That is evolution, small changes became a huge help for these animals for their struggle to survive. He saw how animals could evolve so quickly into a new habitat, using their mental and physical skills to do that.
You might be interested in
Which mineral forms through sedimentary processes
kramer
I think it will be B not fully sure
7 0
2 years ago
Your friend Bruce calls in a panic. He has just come from the doctor and been diagnosed with a bacterial infection. The doctor t
Snowcat [4.5K]

Answer:

Answered below

Explanation:

B cells are a type of white blood cells of a subtype called lymphocytes. They confer acquired or adaptive immunity. This means that B lymphocytes responses to infective microbes are from the memories of their previous encounter with the microbes or antigens.

B lymphocytes fight bacteria and viruses by making Y-shaped proteins called antibodies. These antibodies are specific for each pathogen encountered. They identify and lock on to the surface of invading pathogenic cells and mark and present them for destruction by other immune cells.

Oftentimes, these antibodies are enough to fight off most bacterial infections that we have and therefore there's no need for extensive treatment with drugs.

8 0
2 years ago
Read 2 more answers
Seth will attend college in the fall and live in the dormitory, so he is required to obtain a blank against bacterial meningitis
levacccp [35]

Answer:

vaccine

bacteria

pathogens

cells

toxins

antibiotics

Explanation:

Bacterial meningitis is a serious disease that is caused by an infection which results into Inflammation of brain and spinal cord membranes.

It is generally caused by virus but also caused by fungus and bacteria. A vaccine is required to fight against the bacterial meningitis. Symptoms include fever, stiff neck and headache. This disease is carried by the bacteria present in the throat of infectious person and can transmit through coughing, sneezing and kissing. The bacteria are the pathogens, releases a toxin which destroy cells and surface components of nervous system.

This disease is treated with intravenous antibiotics and corticosteroids (sometimes).

Hence, the correct answers for blanks are vaccine, bacteria, pathogens, cells, toxins, and antibiotics in sequential order.

4 0
1 year ago
When you stub your toe, you first feel a quick, sharp pain transmitted by _______, and then a moment later, a dull, throbbing pa
Zielflug [23.3K]

Answer: The correct answer to the question is option A

A-delta fibers; C fibers

When you stub your toe, you first feel a quick, sharp pain transmitted by A-DELTA FIBERS, and then a moment later, a dull, throbbing pain transmitted by C FIBERS

A-delta fibers are sensory nerve fibers that stimulate pain receptors,they transmit sensory information while C fibers are class if fibers found in the somatic sensory system,they are afferent fibers that conveys input signals from the periphery to the central nervous system.

Explanation: When one stubs the toe,the second-fastest nerve fibers carry messages not from the touch receptors, but the pain receptors; that explains the sharp pain a split second after the thud. They cause what's called second pain, the throbbing pain you feel a few seconds after you stub your toe.

When the toe is stubbed,the impact is felt first before the pain, you're slamming it with a force that is equal to 2-3 times your body weight. (that's about the same force as a karate punch) since the toe has a tiny surface area, that force can't spread out. So the pain stays concentrated at the point of impact before pain is felt,this happens as a result of nerve fibers processing the painful stimuli which brings about that feelings/sensation of pain,and it reverts back after the painful stimulus has been removed.

Stubbing of the tie brings about throbbing toe pain, swelling and bruising.

6 0
2 years ago
Question 1 of 10
Arturiano [62]

Answer:

The organism closest to the coral snake is organism 3, followed by organism 1 and finally organism 2.

Explanation:

The more similar the DNA composition of the organisms, the closer and more closely related they are. With that we can say that the coral snake is closer to organism 3, since the sequence of nitrogenous bases in its DNA is more similar, in relation to other organisms. After organism 3, it is organism 1 that most resembles a coral snake. Organism 2, however, has a different DNA composition, the organism being less similar and the more distant from the coral snake.

3 0
2 years ago
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