Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem. Please select the best answer from the choices provideda. True
b. False

Answers

Answer 1

Answer: The correct answer is true. Reclamation restores an environment affected by mining to a state where it can sustain its ecosystem. Mining is one cause of destroying the ecosystem of a place and in order to restore the balance in that place after the mining ceases one way is to reclaim that place.

Answer 2

Answer: The answer is true, hope this helped

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Homo habilis could adapt to extreme climates and began populating different parts of the world. True false question. True or False

Answers

Final answer:

The statement is false. Homo habilis were primarily found in Africa and there is no solid evidence indicating their ability to adapt to diverse climates or populate different parts of the globe.

Explanation:

The statement you've provided regarding Homo habilis is false. Homo habilis, a species of the tribe Hominini during the Gelasian and early Calabrian stages of the Pleistocene, were mainly found in Africa and there's no concrete evidence that they were able to adapt to extreme climates or begin populating different parts of the world. The process of distributing human species across the world is generally attributed to Homo erectus, a later human ancestor that had significant physical and technological adaptations.

Learn more about Homo habilis here:

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What is the chemical equation for cellular respiration?

Answers

Correct answer is:

$C_(6)H_(12)O_6+6O_(2)\Rightarrow 6CO_(2)+6H_(2)O+energy$

But how to get there?

Let's start with simple explanation of what exactly is cellular respiration.

Cellular respiration is a multistage biochemical oxidation process of organic substances when prime product is energy (ATP - adenosine triphosphate) and other are released waste products.

Cellular respiration takes place even if other metabolic processes are stopped, but cellular respiration may differ in particular organism groups.

Some reactions during whole process of cellular respiration are similar in all types of living organisms.

Cellular respiration is prime indication of declining living processes.

Only viruses which are on the edge of living organism and chemical particle are not performing cellular respiration.

But to the point :P

In cellular respiration all substrates which are in the cell might be organic, but mostly we are using sugar oxidation - glucose in the presence of oxygen.

Chemical formula of sugar looks like this:

$C_(6)H_(12)O_6$

Oxygen is just $O_2$

so for now we have just part of the equation:

$C_(6)H_(12)O_6+O_(2)\Rightarrow$

But what would be on the right hand side?

It's quite simple, remember equation of full combustion? If we want to burn something we need oxygen like in the equation, so the product of this equation would be carbon dioxide, water and of course energy (ATP).

Carbon dioxide formula looks like this:

$CO_(2)$

As a reminder water formula:

$H_(2)O$

Full formula would look like that:

$C_(6)H_(12)O_6+O_(2)\Rightarrow\ CO_(2)+H_(2)O+energy$

But still as you see this equation is unbalanced, after balancing it would like that:

$C_(6)H_(12)O_6+6O_(2)\Rightarrow 6CO_(2)+6H_(2)O+energy$

At the end I would like to explain one more thing. Energy which has been released during this process is part of high-energy connection which might be used to perform chemical reactions in the cell or to move organism for example in muscles. We need to remember that production of ATP is not happening with 100% efficiency and part of this energy is released as heat.

$C_(6) H_(12) O_(6) +6O_(2) ---\ \textgreater \ 6CO_(2) +6H_(2) O+ENRGY$

When adult amphibian skin harbors populations of the bacterium, Janthinobacterium lividum (Jl), chytrid infection seems to be inhibited. Which of the following represents the best experimental design to test whether this inhibition is real?A) Inoculate uninfected amphibians with Jl, and determine whether the amphibians continue to remain uninfected by chytrids.
B) Inoculate infected amphibians with Jl, and determine whether the amphibians recover from infection by chytrids.
C) Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.
D) Take infected amphibians and assign them to two populations. Inoculate one population with a high dose of Jl; inoculate the other with a low dose of Jl. Measure the survival frequency in both populations.

Answers

Answer:

C: Take infected amphibians and assign them to two populations. Leave one population alone; inoculate the other with Jl. Measure the rate at which infection proceeds in both populations.

Explanation:

In scientific investigations, the best way to determine the effect of certain experimental factor on the population of study is to have a baseline for comparison. This is usually referred to as controlled experiment.

In the case of the observation that chytrid infection in amphibians seems to be inhibited by Janthinobacterium lividum, the best way experimental design is to get a population of amphibians suffering from the disease, divide them into two groups and subject them to the same conditions except the introduction of Janthinobacterium lividum to the skin of one of the groups.

A suitable method can thereafter be employed to measure the rate at which infection proceeds in both population. If indeed, the bacterium has the capacity to inhibit the infection, the rate of infection in the group with the bacterium will be significantly less than that of the group without the bacterium.

The correct option is C.

What role do pigments play in the process of photosynthesis

Answers

Answer:

Pigments absorb the light (capture as much light energy as possible) used in the process of photosynthesis.

Explanation:

Photosynthetic pigments are chemical compounds that absorb and reflect certain wavelengths of visible light, that is, they absorb light and have a color.

They are vital components for the process of photosynthesis, the most important pigment is chlorophyll. Chlorophyll is a large molecule, which captures the energy of sunlight and converts it into high-energy electrons. This occurs during the light reactions of photosynthesis, while high-energy electrons are subsequently used during dark reactions in the synthesis of glucose.

Why is a smaller volume of the cell better?

Answers

Cells are so small so the surface area and volume of them can be proportional to each other. This helps with the efficiency of the cell's absorption and waste expulsion processes. Also by the cell's smallness, communication from the nucleus to other organelles is fast and the cell can be regulated while the conditions for diffusion are still ideal.Cells are small because they need to be able to diffuse through materials easily. Also, materials inside and outside of the cell need to easily pass through the cell membrane, which makes it harder and slower for the materials to pass through the cell membrane
Cells are small because the ratio of surface area to volume is the most efficient at their size. This is because when you have a lot of small objects vs a few big objects the surface area is much larger in relation to volume. Another reason is when the cells are small and plentiful, they are easier to replicate and replace when damaged.
If a cell grows beyond a certain size, materials will not be able to pass through the membrane fast enough to accommodate the inside of the cell. So when the cell reaches a size too large, it will divide into smaller cells in order to maintain a surface area/volume ratio that is more favorable to the functioning of the cell. Therefore, cells remain small in order to survive Cells are so small because they must constantly interact with their surrounding environments. This interaction causes cells to replicate themselves by breaking large molecules into smaller ones which allows for the entire surface area of the cell to be in contact with the environment once again. Environmental contact is vital to cells in order for nutrients and other items to pass through the cell membrane for nourishment. Cells are also so small because it is simply easier to replace them without disrupting the functioning of other cells within the normal environment (ex: human body or plant cells).
Cells are so small because they are easier to replace, and a cell needs to be small to be able to perform the tasks a cell needs to do. If cells were bigger it would be harder for the body to replace the cell without disrupting what is going on in the body and delaying a process. Also since the cells are so small it is easier for them to get the nutrients they need and to get rid of waste.
The reason why cells are small is because they are always interacting with the environment around them. In other words, material is always diffusing in or out of the cell through the plasma membrane. If a cell were to grow larger the internal volume increases, as does the surface area of the cell. However, the volume increases at a faster rate than the surface area. So if the cell reaches a large size it must divide or else it will pop. This is because the surface area isn't large enough to occupy the volume the cell holds.
Cells are so small because if their surface area exceeds the volume, then it would require too much energy to keep the cell functioning. By being so small, they are far more sufficient than they would be if they were larger. This is a similar concept with insects. Most insects reach a point where they don't grow any larger because once they are too big, it takes too much energy to keep their bodies functioning. The smaller the cells, the easier it is to produce energy, and to allow materials to flow into and out of the cell. If cells get too big, they require too much energy and will no longer be able to allow material to flow in or out.
There are a few reasons why cells are so small. The smaller the cell is the faster it can communicate which means that it will be able to diffuse faster and with much less complications. Also since cells are small, they can go through reproduction smaller. Just think if we had large cells to reproduce? That might take much longer. If the cells are small, they also wont destruct as easy due to the tough cell walls around a smaller cell. If a bigger cell had the same cell wall, i think it would be easier to be damaged. So the main point about our cells being small is that they are all around faster and more efficient.
-Cells have such a small size for their own benefit. First they are small in size to allow nutrients and other materials to diffuse through the cell membrane, they keep a small ratio of surface area to volume. Also the size of cells makes them easier to reproduce and replace, as this is a constant process.
Cells are so small because they need to minimize the distance between their nucleus and the other organelles that it must constantly regulate. A smaller cell maximizes the speed that intercellular communications can happen, yet still provides ideal conditions for diffusion. If cells were larger, the distance between their nucleus and organelles would be increased, therefore decreasing the maximum speed of the intercellular communications.

Which of the following are considered macromolecules? Select all that apply. (2 points) A. Nitrogen
B. Lipids ******
C. Proteins *****
D. Carbon

The ****** are my answers. Can someone please check to see if their right? Thank you.