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3 years ago

Could someone please explain what a 'Thallus' is?

1 answer:

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Thallus (plural: thalli), from Latinized Greek θαλλός (thallos), meaning "a green shoot" or "twig," is the undifferentiated vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria.

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How have scientists determined the earth's core is composed of iron and nickel?

Sedaia [141]

The correct option from the given options is: "Scientist have determined the composition of Earth's core by using radiometric dating to examine meteorites".
To date materials the procedure of radiometric dating or radioactive dating is used, for example, rocks or carbon, in which trace radioactive impurities were specifically fused when they were framed. The strategy looks at the abundance of a normally happening radioactive isotope inside the material to the abundance of its decay items, which shape at a known consistent rate of decay.

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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.

3 0

2 years ago

Which statement is an example of a scientific theory?

krok68 [10]

Answer:

The big Bang theory

Theory of evolution

Germ theory of disease

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3 years ago

Which of these plant cell structures is also found in a prokaryote?

sashaice [31]

Answer:

D. Cell wall

Explanation:

Cell wall is also present in prokaryotes it is made of peptidoglycan layer.

3 0

3 years ago

Which of the following abiotic factors affects the ocean by creating disturbances that move energy through the water? Nutrients

vova2212 [387]

Answer:

$\huge \boxed{\mathrm{Waves}}$

Explanation:

Waves affect the ocean by creating disturbances that move energy through the water.

As the wind blows on the surface of the ocean, waves are created that transmit energy through the water from a starting point to an end point.

7 0

3 years ago

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