Question

1. The smallest unit that has all of the characteristics of life is the     A. cell B. tissue C. organ D. organ system E. organism.   2. Which level of biological organization is composed of tissues?  A. organism B. organ system C. organ D. cell E. molecules   3. Which sequence correctly lists the different levels of biological organization?  A. cells-organs-tissues-organ systems-organism B. cells-tissues-organ systems-organs-organism C. tissues-cells-organs-organ systems-organism D. tissues-organs-organ systems-organisms-cells E. cells-tissues-organs-organ systems-organisms 4. The body temperature in humans is maintained around 37°C. Which characteristic of life does this statement represent?  Living things acquire materials and energy from the environment. Living things are homeostatic. Living things are adapted. Living things grow and develop. Living things respond to stimuli.    5. Features that make an organism suited to its way of life are called A. ecosystems B. populations C. adaptations D. none of these are correct 6. The three major domains of life are  A. plants, animals, and protists. B. bacteria, fungi, and eukaryotes. C. eukaryotes, prokaryotes, and viruses. D. archaea, bacteria, and eukaryotes. E. eukaryotes, prokaryotes, and fungi. 7. Corn belongs to the kingdom  A. Plantae B. Animalia C. Fungi D.  Protista E. Archaea. 8. Which of the following represents a potential threat to biodiversity?  A. People construct artificial reefs to support marine life. B. Humans clear land for agriculture and housing. C. Energy flows through an ecosystem, with much lost as heat. D. Tropical rain forests and coral reefs are found where solar energy is the most abundant. E. In a food chain, one population feeds on another. 9. A population is defined as A. the number of species in a given geographic area B. all of the individuals of a particular species in a given geographic area C. a group of communities D. all of the organisms in an ecosystem 10. The ultimate source of energy in any ecosystem is (are) A. the sun B. green plants C. fungi D. animals 11. What is the unifying theory in biology that explains the relationships of all living things? A. ecology B. evolution C. biodiversity D. taxonomy 12. A possible explanation for a natural event, based on observations and past knowledge, is a  A. hypothesis. B. phenomenon C. control D. variable E. theory. 13. Which statement is false regarding science?  A. Science helps us to understand the natural world. B. Science strives to be objective rather than subjective. C. Correct scientific conclusions are permanent and never subject to change or refinement. D. Information is gathered by scientific methods. E. Information is gained by observing and testing. 14. Classification of organisms reflects A. similarities B. evolutionary history   C. neither A nor B is correct D. both A and B are correct 15. Which sequence exhibits an increasingly more-inclusive (smaller) scheme of classification? A. kingdom, phylum, class, order B. phylum, class, order, family C. class, order, family, genus D. genus, family, order, class 16. The positively charged particles found in the nucleus of an atom. A. neutron B. proton C. electron D. atom 17. The ____ _____ indicates the number of protons in an atom A. atomic mass B. atomic number C. number of neutrons D. number of electrons 18. A _____ is a substance made up of two or more different elements joined through chemical bonds. A. Organ B. Compound C. Cell D. Atom E. molecule 19. A(n) ____ is the smallest unit of an element that still retains the chemical and physical properties of the element. A. neutron B. molecule C. atom D. acid 20. One of the most abundant and most important inorganic compounds in the body is: A. Water B. Protein C. Glucose D. HCl

Answer 1

Q.1 ) The smallest unit that has all of the characteristics of life is the 

A.1) A. Cell

A Cell is the structural and functional unit of life, it is the basic building block of life.

Q.2 ) Which level of biological organization is composed of tissues? 

A.2) C. Organ

Q.3 ) Which sequence correctly lists the different levels of biological organization? 

A.3) E. cells-tissues-organs-organ systems-organisms

Multicellular organisms have different organ systems which are made up of different organs, the organs in turn are formed by group of cells known as tissues.

Q.4 ) The body temperature in humans is maintained around 37°C. Which characteristic of life does this statement represent? 

A.4) Living things are homeostatic.

Homeostasis means maintain the internal environment of the body, it can be related to temperature, osmolarity etc.

Q.5 ) Features that make an organism suited to its way of life are called

A.5) C. Adaptations

By adaptations organisms better their survival in the existing conditions for them.

Q.6 ) The three major domains of life are 

A.6) D. archaea, bacteria, and eukaryotes.

The three domains of life are given by Woese et al which divides the cellular forms into above three categories.

Q.7 ) Corn belongs to the kingdom 

A.7) A. Plantae

Q.8 ) Which of the following represents a potential threat to biodiversity?

A.8) B. Humans clear land for agriculture and housing.

Biodiversity is characterised by a particular habitat , it is the variety of living organisms found in the particular area.

Q.9 ) A population is defined as

A.9) B. all of the individuals of a particular species in a given geographic area

Q.10 ) The ultimate source of energy in any ecosystem is (are)

A.10) A. the sun

Ecosystem is the interaction between living and non-living, and any ecosystem depends on the sun directly or indirectly as the source of energy.

Q.11 ) What is the unifying theory in biology that explains the relationships of all living things

A.11) B. evolution

Evolution is the the unifying theory of biology which gives the differences and similarities between different organisms.

Q.12 ) A possible explanation for a natural event, based on observations and past knowledge, is a 

A.12) A. hypothesis

Hypothesis can serve the initiation for further research as it is based on limited facts and it is just the speculation.

Q.13 ) Which statement is false regarding science?

A.13) C. Correct scientific conclusions are permanent and never subject to change or refinement.

The above statement is wrong regarding science as the scientific theories can be bettered with new technologies, new discoveries.

Q.14 ) Classification of organisms reflects

A.14) D. both A and B are correct

Classification reflects the similarities between the organisms and also their evolutionary relatedness.

Q.15 ) Which sequence exhibits an increasingly more-inclusive (smaller) scheme of classification?

A.15) A. kingdom, phylum, class, order

The system of classification of organisms was given by Carl Linnaeus. The system is known as taxonomy as we go from the large groups to the smaller one the grouping becomes more and more specific and relatedness between the organisms goes on increasing.

Q.16 ) The positively charged particles found in the nucleus of an atom.

A.16) B. Proton

Q.17 ) The ____ _____ indicates the number of protons in an atom

A.17) B. atomic number

Atomic number is the number of protons in an element, or it can be number of electrons in an atom. The protons are positively charged and present in the nucleus of an atom and electrons are negatively charged and revolves in the orbits. The equal number of protons and electrons in an atom makes it electrically neutral, as the charges are balanced.

Q.18 ) A _____ is a substance made up of two or more different elements joined through chemical bonds.

A.18) B. Compound

When a compound is formed by interaction (by formation of bonds) of the elements, the element loses their individual properties and acquires new properties example NaCl salt, it has properties different from Na sodium and Cl chlorine

Q.19 ) A(n) ____ is the smallest unit of an element that still retains the chemical and physical properties of the element.

A.19) C. atom

Q.20 ) One of the most abundant and most important inorganic compounds in the body is:

A.20) A. Water

Water is the most abundant inorganic compound found in the body, it constitutes about 60 % part of the human body.