Question 1

Which process removes carbon dioxide from the atmosphere?

Accepted Answer

Photosynthesis process removes carbon dioxide from the atmosphere. Green plants remove carbon dioxide from the atmosphere by photosynthesis. The level of carbon dioxide in the atmosphere is maintained by several processes, including photosynthesis, respiration and combustion.

Question 2

Biogeochemical cycles are crucial to ecosystem function because

Accepted Answer

Biogeochemical cycles are crucial to ecosystem function because :: 1. Chemical elements are available in only limited amounts and must be recycled. 2. Nutrients and other life-sustaining molecules are in limited supply and must be continually recycled.

Question 3

Which of the following is a function of the geosphere?

Accepted Answer

The geosphere is the earth's solid rock or rigid outer layer known as the crust. Without the geosphere it would not be possible for humans to live on the planet. The function of the geosphere serving as the interface between the other spheres.

Question 4

Photosynthesis contributes to plant growth by

Accepted Answer

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that can later be released to fuel the organisms activities.

Question 5

Which of the following statements about water is false?

Accepted Answer

Water possess intermolecular hydrogen bonding in the condensed phase. Hence, the given statement 'There is extensive intramolecular hydrogen bonding in the condensed phase.' about water is FALSE.

Question 6

The main products of photosynthesis are

Accepted Answer

The two main products of photosynthesis are sugar and oxygen. Oxygen is emitted as waste product and sugar is used for energy preparation using sun light.

Question 7

Which type of doctor specializes in teeth and jaw alignment?

Accepted Answer

An orthodontist is the type of doctor that specializes in teeth and jaw alignment. When the teeth don't align properly, it can cause uneven wear in the teeth. The jaw is a hinge joint. Strong muscles in the face open and close the jaw. Teeth are implanted in the jaw and serve to rip, tear and crush food in preparation for swallowing it.

Question 8

A homogeneous mixture is also called

Accepted Answer

A homogeneous mixture is also called as solution. The term "solution" is more frequently used when a homogeneous mixture is a liquid, although it is sometimes used if the homogeneous mixture is a gas. Another name for a solid homogeneous mixture of metals is an alloy.

Question 9

Which of the following is a property of water?

Accepted Answer

Yes, we know that water is a universal solvent. Water can moderate temperature because of the two properties: high-specific heat and the high heat of vaporization. Water is a polar molecule that has a high level of polarity and attraction to ions and other polar molecules. Hence, all the above given options are the properties of water.

Question 10

Which of the following is true of a scientific theory?

Accepted Answer

A scientific theory is a well-substantiated explanation of some aspect of the natural world, based on a body of facts that have been repeatedly confirmed through observation and experiment. Such fact-supported theories are not "guesses" but reliable accounts of the real world. Scientific theories are not ever proved in the sense of being proved to be 100% correct. Examples of some scientific theories are :: Evolution, gravity, atomic theory, the germ theory of disease, relativity, quantum theory, electromagnetic theory, layered Earth theory, etc...

Question 11

Human gametes are produced by

Accepted Answer

In humans all reproduction is sexual. It involves joining together haploid gamete cells from each parent with half the normal number of chromosomes to make a new cell containing both parents' genetic material. This is a diploid zygote. The cells from each parent that combine to form the zygote are called gametes. Meiosis produces haploid gametes from a diploid parental cell.

Question 12

Where does transcription occur in the cell?

Accepted Answer

Transcription is a process of production of mRNA which occurs in the nucleus of the cell. After transcription, translation which occurs in the cytoplasm.

Question 13

Condition of decreased oxygen in the blood

Accepted Answer

Oxygen deficiency or decreased oxygen levels in the blood is a condition known as Hypoxemia. Hypercapnia means High carbon dioxide levels in the blood.

Question 14

Free-floating anxiety refers to anxiety that is

Accepted Answer

Free floating anxiety is also known as Generalised Anxiety Disorder in which the individual may be unable to identify specific triggers for the anxiety.

Question 15

The mechanism of water reabsorption by the renal tubules is

Accepted Answer

Water reabsorption by the renal tubules is harmonally controlled and it is a osmosis mechanism.

Question 16

Select the correct statement about the process of scientific inquiry.

Accepted Answer

The correct statement among the given options about the process of scientific inquiry is "It is possible to test hypotheses, such as those involving historical events, without conducting experiments." Although it is not possible to carry out experiments to test hypotheses about evolutionary relationships between living groups or about the timing of the origin of major evolutionary innovations, such hypotheses can be evaluated by making predictions about the expected findings that would result from these hypotheses. Data can then be collected to test whether these predictions are correct.

Question 17

Which of the following includes all the others?

Accepted Answer

Here cellulose, sucrose and glycogen are all the forms of glucose. Hence, glucose includes all the other three given options.

General Science Questions