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Science Questions and Answers (Q&A)

There are three correct answers to this question, as bicycles include three types of simple machines. The first is a lever, which consists of a beam that is pivoted at a fixed hinge. The pedals on bikes are levers. The second simple machine included in a motorcycle is a pulley, which supports movements and changes in direction.

The chains and gears on a bike are the pulleys. The third simple machine is the wheel and axle, which transfers force between each other. On a motorcycle, the front and back wheels act as the wheel and axle. Being that bikes have three simple machines, they are known as compound machines.

3 Answers

No. A flower cannot grow without sunlight, water, and air. Sunlight, water, and air are three basic factors necessary for the growth of any plant; for survival, plants need the three components. Just live other living organisms; plants need food for energy. Photosynthesis is the process in which plants make energy. It is the process by which plants convert light energy to chemical energy (produce a form of sugar and oxygen). Plants cannot survive sunlight for a long time. The plant will begin to die off.

The leaves will get pale and eventually turn yellow with input from sunlight. Plants need carbon dioxide in the process of photosynthesis, as well. The energy in sunlight is used to convert carbon dioxide and water to form sugar and oxygen. In summary, it is impossible for a flower to grow in the absence of sunlight, water, and air as these three components are needed for photosynthesis, which is the energy-generating process that sustains a plant.

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Suman proprofs

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One year has approximatly 52 weeks. One calendar common year has 365 days: 1 common year = 365 days = (365 days) / (7 days/week) = 52.143 weeks = 52 weeks + 1 day. One calendar leap year occures every 4 years, except for years that are divisable by 100 and not divisable by 400.

One calendar leap year has 366 days, when February has 29 days: 1 leap year = 366 days = (366 days) / (7 days/week) = 52.286 weeks = 52 weeks + 2 days. This is viable to anyone, thus we can calculate easily the days, hours, weeks, seconds, and etc.

3 Answers

B. Wright

Always excited to learn and talk about new topics

MiRNA and SiRNA are both discussed in molecular biology. MiRNA stands for micro ribonucleic acid while SiRNA stands for small interfering ribonucleic acid. MiRNA is a type of natural molecule that comes with a single strand. This comes with 22 nucleotides and the location of this is usually in eukaryotes, which means animal cells. SiRNA is different from MiRNA in some ways. For example, SiRNA is double−stranded.

There are also instances when the SiRNA is synthetic, although it can also be available naturally. The MiRNA is usually very useful for the genome but will bind to various parts of it imperfectly. The SiRNA will fit the parts that are needed perfectly.

2 Answers

Shaenamarielhyn

Tomato seeds are green because they contain photosynthetic chlorophyll, which is the pigment in plants that provides them their green color. Chlorophyll is vital in the development of photosynthesis because it allows plants to absorb energy from light. It is responsible for the tomato’s appearance on the inside.

Even when inside a tomato, seeds continue to absorb light. As seeds develop, their outer shells harden to preserve the inner embryo. Tomato seeds are suitable when they are a beige like color. Green seeds are not very likely to turn ripe.

Color of seeds is one variable that gardeners use to verify whether or not seeds are mature enough to germinate. A tomato is ready for seed saving when it is ripe and ready to eat. If the fruit is under-ripe, you may obtain a few edible seeds.

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To understand radioactive tracers it helps to first understand that all substances are made up of atoms and all atoms have a nucleus. The nuclei of some atoms will disintegrate and when they do, they give off energy in the form of particles or waves. This disintegration is called radiation or radioactivity.

The radiation can be detected and measured, for example, with a Geiger counter. There are also other kinds of radiation detection instruments that can measure the radioactivity being released. So radioactive tracers can be used to trace or follow how a substance moves through, for example, a plant or the human body.

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One of the more unconventional (and still underutilized) ways of generating electricity is by capturing human body heat. Ventilation systems in shopping malls and underground subways have been converted to turn excess body heat into hot water. The hot water is then used as a heating source. Two other natural sources are glow-in-the-dark jelly fish and algae. Scientists have found a way to use a green fluorescent protein found in some jelly fish to create miniature fuel cells.

Scientists have also “worked out a way to turn living algae into what is effectively a floating biological solar cell that could be used to generate power from almost any non-freezing body of fresh or salt water.”

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There's more than one name put forward as The Father of Science. This is because Science has a number of disciplines within its massive area. It is common practice to point to Galileo because he created the approach to scientific study, the scientific method, by which a hypothesis is formed and then tested out in carefully controlled and recorded circumstances.

Galileo was named as the father of science by Stephen Hawking, the great scientist of our own era. Galileo is also considered to be the father of modern physics...but so is Einstein, so is Newton. However, neither of them is the father of Biology, say, or of other great areas of Science.

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The correct answer to this question is Diffusion selectively permeable membrane. Osmosis occurs when water moves through the membrane of a cell. Another part of osmosis is water potential. This occurs when water moves in and out of the cell.

There are two types of water potentials, which are high potential and low potential. Pure water has a high water potential, while soluted water has a low potential. Osmosis is how plants take in water and the water is taken in through the plants roots. Our body also goes through osmosis and the process is intrical to keeping our kidneys clean.

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There are a lot of theories about who actually started to use pi when trying to solve the circumference of the circle. Some say that it was first discovered in India in the 5th century. It was used by Aryabhata when he was 23 years old. Some say that it was first used by David Gregory in the year 1697.

it was also used by William Jones in the year 1706. The “official” person who has stated the value of pi is Archimedes of Syracuse. He is said to have done it during his lifetime which is from 287 - 212 BC. It is evident that other people agreed with him and this formula is still being used now.

2 Answers

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