Scientific Reasoning MCQs

Question 1

Echinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow. The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding Table 2 includes examples of echinoderms habitats around the world. The echinoderm shown below is most likely a:

Accepted Answer

Sea cucumber

Answer

Sea lily

Answer

Starfish

Answer

Brittle star

Question 2

Echinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow. The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding Table 2 includes examples of echinoderms habitats around the world. According to Table 1 and Table 2, crinoids can be found feeding on plankton:

Accepted Answer

in offshore mud and ooze.

Answer

near the shore

Answer

in deep ocean trenches.

Answer

on the deep-sea floor

Question 3

Echinoderms are defined as any of a variety of invertebrate marine animals characterized by a hard, spiny covering or skin. They have attracted much attention due to their extensive fossil record, ecological importance, and bizarre body forms. Most echinoderms are extinct, but many living representatives still exist. All living echinoderms have an internal skeleton and a central cavity, but the outward appearance can vary significantly. For example, starfish and brittle stars have arms that extend from a central disk; sea lilies have a central stalk, or stem, and resemble flowers; sea cucumbers are wormlike and tend to burrow. The ways in which echinoderms move and feed are as diverse as their body forms. Table 1 lists certain echinoderms and their methods of locomotion (movement) and feeding Table 2 includes examples of echinoderms habitats around the world. Based on the data provided in the passage, sea cucumbers most likely burrow in order to:

Accepted Answer

Move offshore.

Answer

Locate food.

Answer

Avoid worms

Answer

Shed their spines

Question 4

A student hypothesised that large populations of sea cucumbers could greatly alter the physical and chemical composition of the sea floor. Is this hypothesis supported by the data in the passage?

Accepted Answer

Yes; sea cucumbers feed by swallowing sediment, extracting organic matter, and ejecting the remainder.

Answer

Yes; sea cucumbers often prey upon commercially important organisms, such as oysters.

Answer

No; sea cucumbers cannot burrow into the sediment, so will not affect the composition of the sea floor.

Answer

No; sea cucumbers do not have a viable method of locomotion.

Question 5

A mercury thermometer, at an initial temperature of 20◦C, was placed in 40◦C water, and the temperature registered by the thermometer was recorded over time. This procedure was repeated using water samples at 50◦C and 60◦C (see Figure 1). Next, the same thermometer, at an initial temperature of 60◦C, was placed in an air sample at 50◦C, and the temperature registered by the thermometer was recorded over time. This procedure was repeated using air samples at 30◦C and 40◦C (see Figure 2) Based on Figure 1, at 3.0 sec, the thermometer reading in the 40°C water most likely was closest to which of the following?

Accepted Answer

36°C

Answer

47°C

Answer

42°C

Answer

31°C

Question 6

A mercury thermometer, at an initial temperature of 20◦C, was placed in 40◦C water, and the temperature registered by the thermometer was recorded over time. This procedure was repeated using water samples at 50◦C and 60◦C (see Figure 1). Next, the same thermometer, at an initial temperature of 60◦C, was placed in an air sample at 50◦C, and the temperature registered by the thermometer was recorded over time. This procedure was repeated using air samples at 30◦C and 40◦C (see Figure 2) According to Figure 2, for an air temperature of 30°C, over which of the following time intervals was the thermometer reading changing most rapidly?

Accepted Answer

0-100 sec.

Answer

100-200 sec.

Answer

200-300 sec.

Answer

300-400 sec.

Question 7

Photosynthesis and photography both involve light sensitive reactions. The leaves of plants containa green pigment called chlorophyll. This can absorb radiation in the visible region of theelectromagnetic spectrum and use this energy to synthesize chemicals and provide food for theplant.During photosynthesis, plants transform carbon dioxide and water into oxygen and sugars such asglucose:6CO2 (g) 6H2O(l) C6 H2 O6 (aq) 6O2 (g)Δg 2820kJ 2 + 2 → 6 12 6 + 2 = +2820kJIn the absence of sunlight, energy is no longer provided and photosynthesis ceases.Photosynthesis is a/an:

Accepted Answer

Endothermic reaction

Answer

Exothermic reaction

Answer

Addition reaction

Answer

Substitution reaction

Question 8

In C language, %x is used to print.

Accepted Answer

Unsigned hexadecimal integers

Answer

Unsigned hexadecimal integers short

Answer

Unsigned hexadecimal long integers

Answer

Signed hexadecimal integer

Question 9

Which of the following is the standard protocol for the internet?

Accepted Answer

TCP/IP

Answer

TCP (Transmission Control Protocol)

Answer

IP (Internet Protocol)

Answer

HTTP (Hypertext Transfer Protocol)

Question 10

Which of following the extension of program file?

Accepted Answer

Both A & B

Answer

.com

Answer

.exe

Answer

.doc

Question 11

What is the printing speed of a laser printer measured in

Accepted Answer

Pages per minute (ppm)

Answer

Characters per second (cps)

Answer

Dots per inch (dpi)

Question 12

The data protection technique that aims at recovery to a system is:

Accepted Answer

Data backup

Answer

Password protection

Answer

Antivirus software

Answer

UPS

Question 13

CAD test production prototypes according to which parameters?

Accepted Answer

A production can be modified without need of bringing production to a computer standstill

Answer

Compile parts & quantities list

Answer

Outline production & assembly procedures

Answer

Both a, b

Question 14

What is the most common computer crime reported to the United States Department of Justice according to the Federal Bureau of Investigation's Internet Crime Complaint Center (IC3) 2022 Annual Report?

Accepted Answer

Phishing

Answer

Identity Theft

Answer

Data Breaches

Answer

Child Sexual Abuse Material

Free Scientific Reasoning MCQs with Answers