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3 years ago

Research and produce a summary about the history of the microscope.

1 answer:

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Microscopes have been used for centuries in order to see specimen scientists cannot see with their unaided eye. Antón VanLeeonhoeuk is given credit for designing the first lenses for microscopes in the 16th century. He looked at “animacules” which we would now call bacteria and protists. Robert Hooke first coined the term cell, as he looked at cork and thought it looked like cells that monks slept in. Improvements were made in the following centuries, and Ernest Leintz in the 1800s creates a way to have differing magnification lenses on one microscope. Continuing into the 1900s and 2000s there are now electron scanning microscopes, ultraviolet microscopes, atomic force microscopes, and electron tunneling microscopes—all which allow scientists to have better resolution and to see smaller and smaller things. Microscope technology will continue to improve as scientists discover more ways to magnify the microscopic world.

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PLSSS HELP! Geologists use rock samples and_________evidence to prove what Earth's ______

Rus_ich [418]

Answer:

geologists use rock samples and direct evidence to prove what earth's structure is like.

Explanation:

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3 years ago

Three cells each contain a 98% water wash were soaked in different solutions cell number one is so funny solution containing 100

stepladder [879]

Answer: Cell number one is an hypotonic solution, cell number two is an isotonic solution, and cell three is an hypertonic solution.

Explanation:

Cell number one which is a 98% water content is added the 100% water solution, water moves from low to high concentration. Therefore, the water moves from the solution into the cell, which is hypotonic.

Cell number two which is a 98% water content added with a 98% water solution. These two solutions are equal to one another, so the water does not move. This is isotonic.

Cell number three which is a 98% water content added with a 80% water solution. Water moves from high to low concentrations, so water moves from the cell to the solution. The water leaves the cell, which is an hypertonic.

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3 years ago

Which carbohydrate(s) are structural compounds?

muminat

Answer:

Carbohydrates are important macromolecules that consist of carbon, hydrogen, and oxygen. They are organic compounds organized in the form of aldehydes or ketones with multiple hydroxyl groups coming off the carbon chain.

Explanation:

7 0

3 years ago

In your own words, what is the definition for Osmotic pressure?

ANTONII [103]

I love this topic

Answer:

Osmotic pressure is defined as the pressure that must be applied to the solution side to stop fluid movement when a semipermeable membrane separates a solution from pure water.

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2 years ago

1. Most familiar life forms live in regions of biomes that humans inhabit. (1 point)

Genrish500 [490]

Answer:

1. The first statement is true. A biome is defined as a large set of naturally occurring plants and animals occupying a major habitat. For e.g. forest, dessert, grasslands etc.

2. The given statement is True. Biodiversity is defined as the variety of plants and animals exists or existed in the world or in any specific habitat. The high level of biodiversity is important and beneficial for the environment.

3. This statement is False. Outside force such as earthquake, zone hole etc can certainly cause changes in the organism. For example, UV rays can cause cancer in an organism, dark colorization of peppered moth during industrial revolution.

4. It is True as species is defined as a group of organisms capable of interbreed and share common characteristics. It is the basic unit of biological classification. For example, <em>sapiens </em>is the species of human being.

5. Yes, the given statement is true. Charles Robert Darwin famous naturalist, biologist, and geologist. He was best known for his work in the field of evolution and gave the theory of natural selection. He is also known as the father of evolution.

6. No, all scientists were not agreed with Charles Darwin, for example, Lamarck, Weismann etc. However, Neo-Darwinism was much more accepted that Darwin original theory. Hence, the given statement is false.

7. Natural selection is one of the process of evolution. It sates that organisms better suited and adapted to their environment have better chances of survival. Organisms acquire new characteristics over the generations in order to adapt in a environment. Hence, the given statement is false.

8. The statement is true. However, recently it has been found that there are some bacteria which can inhabit the extreme conditions. They are known as extremophiles, for example, halophiles, thermophiles etc.

9. Yes the statement is true. These organisms are known as extremophiles, for example, halophiles (which live in high saline conditions), thermophiles (can live in high temperatures) etc.

10. This statement is false as there are many species which have not been discovered yet.

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2 years ago