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3 years ago

Without making any other adjustments the _____ can be increased by focusing properly.

1 answer:

6 0

Resolution is the ability that a microscope has to distinguish fine details. Without making any other adjustments the RESOLUTION can be increased by focusing properly in a brightfield microscope.

A brightfield microscope (also called compound light microscope) is a light microscope that produces dark images against a bright background.

The brightfield microscope is widely used in cellular biology and microbiological laboratories.

The resolution of the brightfield microscope is limited to 0.2 micrometers (µm).

This maximum value can be reached by changing the objective lens.

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Name and describe one of the three conditions Dr. Natterson-Horowitz mentions that have been well-studies by veterinarians, who

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Capture myopathy is a heart condition in animals specifically in tamarins. Dr Natterson-Horowitz studied the condition and discovered that it is similar to cardiomyopathy which is a heart condition in humans. She also studies some conditions that are parallel to both humans and animals.

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3 years ago

Which kind of virus begins multiplying first? How soon after infection does this happen?

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Lytic viruses signs and symptoms can be felt as soon as 12 hours. More likely it’s about 2-3 days.

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3 years ago

Match the following terms and definitions. 1. an electrical nerve impulse sent by nerve fibers to the central nervous system for

vladimir1956 [14]

Answer:

1. an electrical nerve impulse sent by nerve fibers to the central nervous system for interpretation. Action potential.

2. neurons that detect chemicals such as those found in food. Chemoreceptors.

3. type of eyes many arthropods have; eyes that protrude outward and consist of many lenses. Compound eyes.

4. the structure that gives the response to an environmental change. Effector

5. neurons that detect electrical fields. Electroreceptors.

6. secretion of hormones into the blood stream to affect distant processes. Endocrine.

Explanation:

An action potential is a change in the internal charge of a cell due to depolarization. These changes allow the transmission of a message from any part of the body to the central nervous system. The central nervous system will interpret the message and will give a response.

There are different types of receptors in our bodies. Chemoreceptors are the ones that detect chemicals and produce an action potential or a neurotransmitter. These receptors respond to chemicals. Another type of receptor is the electroreceptors. They detect electrical fields and are only on the skin of aquatic animals.

Compound eyes have a large number of ommatidia. As a result, the anthropods with this type of eyes have a large view angle. In other words, every ommatidium sees an image, and the final product is a combination of all of them.

The effector is the structure that gives an answer once an affector has sent the message to the nervous system that there was a change in the environment.

There are different kinds of secretions, autocrine, paracrine, and endocrine. In the endocrine secretion, the gland secrets hormones into the bloodstream so that they can travel long distances up to their target cell, which is far from the gland.

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3 years ago

Complete the sentences to describe natural selection

Vikentia [17]

The environment needs to change in order to natural selection to occur.

Reason:

Because, Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

2. Population has some genetic variations.

Reason:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by:

mutation and random mating between organisms

3. Nature select organism with specific traits to survive and reproduce.

Reason:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

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3 years ago

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