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Whales EVOLVED from land-living mammals. As such, whales must breathe air REGULARLY, although they can remain SUBMERGED under water for long PERIODS of time. Some species such as the sperm WHALE are able to stay submerged for as much as 90 minutes. ,

a. SILICON with 4 VALENCE ELECTRONS

they have STREAMLINED BODY

tion:EXAMPLES to show that friction is a friend and a foe: Friction is friend: (i) Friction allows US to grip and catch different objects. (ii) It helps us to walk comfortably on the surface. (iii) It helps to MINIMIZE the SPEED or to STOP the moving objects.

this is the LIMITATION of MENDLEEV's PERIODIC MOTION.

tion:a substance USED for DESTROYING insects or other organisms harmful to cultivated plants or to ANIMALS.

both the REACTIONS are EXOTHERMIC and both ASSERTION and REASONS are CORRECT

The COMPOUND formed by these TWO ELEMENTS will be : xy. xy2.HOPE IT HELPED!!!⚡

A computer is a programmable device that stores, retrieves, and processes data. The term "computer" was ORIGINALLY given to humans (human computers) who performed numerical calculations using MECHANICAL CALCULATORS, such as the ABACUS and slide RULE.

tion:Locomotion: Movement from one place to another. And the ability to locomote, to get from one place to the next. ... Locomotion is derived from the Latin "locus", place + "movere", move = move place.In general, ANIMALS require locomotion for defence, SEARCHING for food and shelter. The locomotory movement is the COORDINATED movement of VARIOUS bones, tissues and joints such as cartilage, MUSCLES, bone, ligaments, and tendons, etc.

enhouse effect is a process that occurs when gases in EARTH's ATMOSPHERE TRAP the Sun's heat. This process makes Earth much warmer than it WOULD be without an atmosphere. The greenhouse effect is one of the things that makes Earth a comfortable PLACE to live. please mark me as brainliest

ChantChant (or plainsong) is a monophonic SACRED (single, unaccompanied melody) FORM which represents the earliest known music of the Christian church. Chant DEVELOPED separately in several European centres. Although the most important were Rome, Hispania, GAUL, Milan, and Ireland, there were others as well.

The Seebeck effect DESCRIBES the GENERATION of ELECTRICITY following the connection of TWO dissimilar electrical conductors or semiconductors that ILLUSTRATES the thermoelectric effect.

s sometimes referred to as Fauns, meaning forest spirits. By definition, fauna is a group of INDIGENOUS animals of any geographical region. So, the term FLORA and fauna was coined by biologists to refer to a COLLECTION of plant and animal specifies in a given geographic LOCATION.

io waves used by MOBILE devices are part of the ELECTROMAGNETIC wave spectrum and travel at the speed of light. Your mobile USES radio waves to transmit SIGNALS to a NETWORK of base stations. Mobile devices need the antennas on top of the masts to send and receive your communications.

A work ENVIRONMENT free from INJURIES and accidents attracts employees. Employees are more satisfied and productive in such an environment. A safe work environment is important for both employees and employers alike. It is the right of all employees to have SAFETY in the workplaceExplanation:PLS mark me as brainliest answer

here your answer I will use free space around my home to make a garden and GROW some plants because in CITIES the AIR POLLUTED the most so by GROWING plants and trees we can get some good oxygen and we can grow fruit and flower trees also for fruits and flowers by using it like this is good for us Hope it helps you dear. . . .

Given, self-inductance, L=0.05 HenryRate of change of current, dtdi =100As −1 Let, Magnitude of e.m.f. EWE know that, L= di/dte 0.05= ∣∣∣∣ 100E ∣∣∣∣ ∣e∣=5V

Causes of CorrosionMetal corrodes when it reacts with another substance such as oxygen, hydrogen, an electrical current or even DIRT and bacteria. CORROSION can also happen when METALS like steel are PLACED under too much stress causing the MATERIAL to crack.mark me as brainliest..

the limitations were his LAW was APPLICABLE till calcium only after that the PROPERTIES were not REPEATED

While BUDDING CARBON DIOXIDE gas may be released by yeast.Explanation:answer is a) Carbon dioxide

Radiation is the transfer of heat energy through space by electromagnetic radiation. Most of the electromagnetic radiation that COMES to the earth from the sun is invisible. Only a small PORTION comes as visible light. Light is made of waves of DIFFERENT frequencies.

Najba meaning is to CATCH or take something from and the definition of a najba is a word that EXPRESSES action or a state of being. Najba vary by type, and each type is DETERMINED by the KINDS of words that accompany it and the RELATIONSHIP those words have with the verb itself.

1-f2-t3-f4-t=true and f=falsemy my ANSWER BRAINS LIST PLEASE

compounds areimportant because they serve as the basis for all carbon-based on earth, CREATE ENERGY PRODUCTION in BIOLOGICAL life, cause atmospheric DEPLETION and release hydrocarbon energy.Hope it helps you☺️❤️✌️⚡

Science and technology has such extraordinary uses which has TOTALLY CHANGED human lifestyle. It has some unique uses which have helped us to compete with this challenging world. Its uses are indefinite and it can’t be described in some sentences in a piece of paper. Science and technology have various uses in various sectors. Its use is sector wise. Such as in medical sector it is used in various medical operating tools, x-ray machines, blood pressure calculating machines, hear beat machines, etc. Similarly in engineering sector it is used in motors, machines carrying heavy load, etc. As well in home sector it is used in Air conditioner, Refrigerator, Gas stove, etc. The use of science and technology is world wide. It has now become a compulsion for we people. That’s why its use is also high. It is also used in used in marketing work, office work, technical work, domestic work, etc. I think that there is no place in this whole planet where use of science and technology is not found. Its use has become global throughout the whole world. Also science and technology is used in making work doing robot which can EASILY do all domestic as well as official work alone. It is also a TYPE of gift provided by science and technology to this world. Science and technology has also been used in making spaceships, missiles, automobiles, etc. It has also been used in carrying research. Science and technology has folded whole planet in its use. Overall, now we can say that there is no place in this planet where science and technology is not used. So, we should realize its uses and should only use it in positive way, so that we can gain from it. If we use it in NEGATIVE way, we are the one who will get loss. So, its use is too much precious for us and also for place where we live in.Explanation:

Water GETS contaminated by following:Untreated sewage.Practice of BATHING and washing NEAR a water body.Practice of cremating the dead bodies near RIVER banks.Oil spill.Throwing chemical waste into waters.Dumping AGRICULTURAL waste into water.

Geobacter was found to be the first organism with the ABILITY to oxidize organic compounds and metals, including iron, radioactive metals, and petroleum compounds into environmentally benign carbon DIOXIDE while using iron oxide or other available metals as electronThe petroleum-hydrocarbon-degrading bacteria ... The SW medium is comprised of (per litre) 1 l seawater, 1 G .Explanation:hope it HELPS!

Kerosine has strong ODOR and ethyl alcohol has weak odorExplanation:PLEASE MARK ME AS BRAINLIEST

hydrogen sulphide REACTS with SULPHUR Dioxide to form Sulphur and waterExplanation:PLS mark me as BRAINLIEST answer

epletion CONSISTS of two related events observed SINCE the LATE 1970s: a steady lowering of about four PERCENT in the total amount of ozone in Earth's atmosphere (the ozone layer), and a much larger springtime decrease in stratospheric ozone around Earth's polar regions.The latter phenomenon is referred to as the ozone hole. There are ALSO springtime polar tropospheric ozone depletion events in addition to these stratospheric events.

Eukaryotes are organisms whose cells have a NUCLEUS enclosed WITHIN a nuclear envelope. Eukaryotes belong to the domain EUKARYOTA or Eukarya; their NAME comes from the GREEK εὖ and κάρυον.Explanation:please mark me as brainliest

(D) IS THE CORRECT ANSWER

the ANSWER of your QUESTION

Here is a list of PRODUCTIVE things to do that will prove both productive and EFFECTUAL for you in PROFESSIONAL and personal growth:TAKE a break. ...Get organized with nTask productivity app. ...Listen to productivity podcasts. ...BRUSH up on your skills. ...Learn a new language. ...De-clutter your inbox. ...Planning ahead.Read.

Vertebrates are animals with backbone and SPINAL cord WHEREAS photochordates are the informal name given to invertebrates that have notochord, DORSAL nerve chord and pharyngeal SLITS. Backbone is a part of the internal skeleton FORMED in the vertebrates whereas photochordates do not have a backbone

I THINK 25 PERCENT I think

Vibration, periodic back-and-forth MOTION of the particles of an elastic body or MEDIUM, commonly resulting when almost any physical SYSTEM is DISPLACED from its equilibrium CONDITION and allowed to respond to the forces that tend to restore equilibrium.

ference between a weak acid and strong acid is given below.Explanation:An acid that COMPLETELY DISSOCIATES into its IONS is called a strong acid. The acid does not completely DISSOCIATE into its ions and remains unionized is called weak acid. For example, hydrochloric acid is a  strong acid because it completely ionizes into H+ and OH- ions in body fluids. While CH3COOH is a weak acid because it ionizes INCOMPLETELY and forms CH3COO- and H+ ions.

In a chemical reaction the total MASS of all the substances TAKING PART in the reaction remains the same. Also, the number of ATOMS in a reaction remains the same. ... The law of conservation of mass states that the total mass of substances taking part in a chemical reaction is CONSERVED during the reaction.

रोशनी is the meaningExplanation:HOPE it HELPS you