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andreyandreev [35.5K]
3 years ago
10

Which term is used to describe a fact that has always been observed true but could at some future time not be observed as true.

Biology
1 answer:
tester [92]3 years ago
6 0
Theory is what you are looking for<span />
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Where is most of the water located on earth
Levart [38]

Answer:

The Ocean

Explanation:

Most of the water on Earth is located inside of the ocean.

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A possible explanation for the effectiveness of ________ is that it may reduce depression by triggering the long-term potentiati
k0ka [10]

Answer: Antidepressants

Explanation:

The effectiveness of ANTIDEPRESSANTS is best explained by how they stimulate the synapse junctions of several neurons in the body to a top frequency, thus inducing a continuous "feel-good" feeling in the patients administered such drugs.

This ability of antidepressants to sustain this "feel - good" feeling supresses depression and is known as the long-term potentiation of nerve cells.

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Explain the mechanisms for movement of materials across cellular membranes anatomy
trapecia [35]
There are 2 types of transport mechanisms that involve the movement of materials across the cellular membrane:

1. Passive Transport Mechanisms which is the movement of materials that does not require energy. Instead the movement relies on the permeability of the cell. Under this are three kinds of passive transport mechanisms:

a. Simple Diffusion: 
- the movement of materials from a region of higher concentration to lower concentration. No external energy is necessary for the movement. The materials supply the energy themselves. 

b. Facilitated Diffusion:
- This differs from simple diffusion because the movement is facilitated by proteins that make up the structure of the membrane. The proteins include channel proteins that allow ions and smaller molecules to cross the membrane. The other protein are the carrier proteins, which bind to materials like sugar molecules and move it across the membrane.  

c. Osmosis:
- This is the diffusion of water across the membrane. Osmosis moves water from regions where there are more water molecules of water per volume to regions where there are less water molecules per volume.  

2. Active transport on the other hand is a movement mechanism that requires energy. It uses the energy to send materials against the direction it is coming from through simple diffusion. This mechanism is used in a way to keep unwanted ions or other materials out of the cell.
6 0
3 years ago
A cylinder with a mass of 12 g has a radius measuring 2 cm and a height of 6 cm. What is its density? 0.05 g/cm3 0.16 g/cm3 1 g/
valina [46]
Given:
m = 12 g, the mass of the cylinder
r = 2 cm, the radius of the cylinder
h = 6 cm, the height of the cylinder.

Calculate the volume, V, of the cylinder.
V = πr²h
   =  π*(2 cm)²*(6 cm)
   = 75.398 cm³

By definition,
density = mass/volume.

Therefore,
density = m/V
             = (12 g)/(75.398 cm³)
             = 0.159 g/cm³
             = 0.16 g/cm³ (nearest hundredth)

Answer: 0.16 g/cm³

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3 years ago
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Select the crops that might best be grown under metal halide HID lights.
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Answer:

They’re perfect for growing all kinds of greens like lettuce, spinach, peppers, tomatoes, flowering crops in the vegetative stage and many others.

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