Our nearest star offers more than one possible solution. But scientists are still searching for a complete explanation of why we sleep and dream.

The liquid metal is Correct Answer → Option CA. Atoms, elements, compounds, and mixtures are all forms of matter. We’re already harnessing the sun’s energy to produce solar power. This question can be solved using the classic equation of motion: distance = velocity * time. The former, first discovered in 1933, acts as an invisible glue, binding galaxies and galaxy clusters together. We do know that it’s to do with different brain regions networked together rather than a single part of the brain.

However, a recent idea – called M-Theory – may one day explain the unseen centre of one of the universe’s most extreme creations. Understand the Problem2. eNotes.com will help you with any book or any question. Which blood cells are called 'Soldiers' of the body Correct Answer → Option AA. The light bulb uses 60 watts and is run 24 hours a day. A closed system does not exchange mass with its surroundings and is only capable of exchanging energy with the surroundings. A lot of the things we once thought distinguishing about us – language, tool-use, recognising yourself in the mirror – are seen in other animals. Blue C. Violet D. Green Show Answer →, Q.

The Big Questions in Science: The Quest to Solve the Great Unknowns is published by Andre Deutsch. Perhaps not. Just looking at your DNA won’t tell you – the human genome is 99% identical to a chimpanzee’s and, for that matter, 50% to a banana’s. It's important for scientists to know the properties of matter because all things are made up of matter. The hope is that these solutions can meet our energy needs.

Organelles are tiny structures within a cell, that help it to function.

Scientists are considering new materials, such as atomically thin carbon – graphene – as well as new systems, such as quantum computing. Watch regularly for any update. But we don’t know how long it will stay there, or what the risks might be.

Concave B. Convex C. Cylindrical D. None Show Answer →, Q. Science Questions and Answers - Discover the eNotes.com community of teachers, mentors and students just like you that can answer any question you might have on Science The short answer is no.

How did we get DNA?

Four billion years ago, something started stirring in the primordial soup. We spend around a third of our lives sleeping. To buy a copy for £11.99 with free UK p&p, go to guardianbookshop.co.uk . The physical change is quite obvious and in fact, it can be seen.

From the nature of the universe (that's if there is only one) to the purpose of dreams, there are lots of things we still don't know – but we might do soon. The atomic mass is the sum of the protons and neutrons. Modern robotics can offer us a “staff” of individually specialised robots: they ready your Amazon orders for delivery, milk your cows, sort your email and ferry you between airport terminals.

The number of people on our planet has doubled to more than 7 billion since the 1960s and it is expected that by 2050 there will be at least 9 billion of us.

Subscribers to Sigmund Freud’s views believed dreams were expressions of unfulfilled wishes – often sexual – while others wonder whether dreams are anything but the random firings of a sleeping brain. If you spot any typographical, grammatical or factual error in our site, then please let us know. Alongside innovative, if gross-sounding, methods such as transplanting “good” bacteria from fecal matter, and the search for new bacteria deep in the oceans, we may yet keep abreast in this arms race with organisms 3bn years our senior. When they meet, both disappear in a flash of energy. To celebrate the launch of its new publication Mosaic the Wellcome Trust asked leading scientists, journalists and thinkers what they thought was the biggest question remaining in science… From these objective type Science mcq questions you will get an idea what types of short questions from Science are actually asked in competitive examinations. The Big Questions in Science: The Quest to Solve the Great Unknowns is published by Andre Deutsch. ExamTiger provides you lots of fully solved frequently asked General science GK questions that includes General Physics, Chemistry and Biology with answers. Temperature is a... Latest answer posted April 9, 2018 11:17 am UTC. Radio telescopes have been eavesdropping on the heavens and in 1977 a signal bearing the potential hallmarks of an alien message was heard. they have withstood all attempts to unify them. And though we haven’t quite worked out all the details, the clues we are gathering about DNA damage, the balance of ageing, metabolism and reproductive fitness, plus the genes that regulate this, are filling out a bigger picture, potentially leading to drug treatments. Unveiled in 1998, the latter is pushing the universe’s expansion to ever greater speeds. Igneous, sedimentary, and metamorphic are the three types of rocks. Rats, for example, have been shown to replay their waking experiences in dreams, apparently helping them to solve complex tasks such as navigating mazes. Yet this legacy is in danger – in Europe around 25,000 people die each year of multidrug-resistant bacteria.

That way, you can compare... Latest answer posted September 17, 2010 11:32 pm UTC. Perhaps it’s our culture – and its subsequent effect on our genes (and vice versa) – that makes the difference.

We humans are linked by evolution to those early biological molecules. Considering how much time we spend doing it, you might think we’d know everything about it. WBC B. Platelets C. RBC D. All of the above Show Answer →. Sound and light are similar in that both are forms of energy that travel in waves. Red B. Where are we all going to live and how are we going to make enough food and fuel for our ever-growing population? But how do we do it? We have two known parameters and one unknown parameter; however, in order to solve the problem we must... Latest answer posted February 23, 2012 10:20 pm UTC.

To answer this question I will quote Karl Barth's opinions. We could even start feeding ourselves with lab-grown meat. Form a Hypothesis4.... Latest answer posted July 16, 2011 3:49 am UTC. This is an oxidation-reduction reaction, in... Latest answer posted May 11, 2016 1:19 am UTC. In this case, the ball started at rest, so... Latest answer posted September 6, 2010 2:24 pm UTC. The fact you can shop safely on the internet is thanks to prime numbers – those digits that can only be divided by themselves and one. The elimination of toxic nitrogenous waste and excess water in man is by Correct Answer → Option AA. In an attempt to unravel this “fine-tuning” problem, physicists are increasingly turning to the notion of other universes.


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