1. An attribute found in plants but not animals is
(1) Metabolism
(2) Sexual reproduction
(3) Autotrophy
(4) Asexual reproduction
ANS: An attribute found in plants but not animals is Autotrophy. Autotrophic organisms are those that produce their own food through the process of photosynthesis or chemosynthesis. This is a characteristic feature of plants, algae, and some bacteria, which are capable of making their own food using simple inorganic substances like carbon dioxide, water, and sunlight.
2. Which of the following is less general in characters as compared to genus
(1) Species
(2) Family
(3) Class
(4) Division
ANS: The taxonomic category that is less general in characters as compared to genus is species. A species is a group of organisms that share similar characteristics and can interbreed to produce fertile offspring. It is a more specific category than the genus, which includes a group of related species.
3. An attribute found in plants but not animals is
(1) Metabolism
(2) Sexual reproduction
(3) Autotrophy
(4) Asexual reproduction
ANS: An attribute found in plants but not animals is Autotrophy. As mentioned earlier, autotrophic organisms produce their own food using simple inorganic substances like carbon dioxide, water, and sunlight. Animals, on the other hand, are heterotrophic and depend on other organisms for their food.
4. Which of the following is less general in characters as compared to genus
(1) Species
(2) Family
(3) Class
(4) Division
ANS: The taxonomic category that is less general in characters as compared to genus is species. As explained earlier, species is a more specific category than the genus.
5. Consider the following two statements:
I. In single-celled organisms, we are not very clear about the usage of the two terms – growth and reproduction.
II. When it comes to unicellular organisms like bacteria, unicellular algae or amoeba, reproduction is synonymous with growth, i.e., an increase in number of cells.
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true but II is false
4. Both I and II are false
In single-celled organisms, growth and reproduction are often used interchangeably, and the increase in the number of cells is a direct result of reproduction.
ANS: The correct answer is option 2, i.e., Both I and II are true but II does not explain I. In single-celled organisms like bacteria, unicellular algae, or amoeba, growth and reproduction are often used interchangeably. This is because an increase in the number of cells is a direct result of reproduction. However, the usage of these terms is not very clear in such organisms.
6. Consider the following two statements:
I. Cellular organization of the body is the defining feature of life forms.
II. Metabolic reactions cannot be demonstrated outside the body in cell-free systems.
1. Both I and II are true and II explains I
2. Both I and II are true but II does not explain I
3. I is true but II is false
4. Both I and II are false
ANS: The correct answer is option 2, i.e., Both I and II are true but II does not explain I. Cellular organization is a defining feature of life forms as it allows them to carry out various functions. Metabolic reactions can be demonstrated outside the body in cell-free systems, but they are not as efficient as those occurring inside the cell.
7. The most obvious & complicated feature of all living organisms is:
(1) The ability to sense their surroundings or environment and respond to these environmental stimuli.
(2) Reproduction - sexual or asexual - for production of progeny of own kind.
(3) The ability to growth in size due to cell division.
(4) Presence of complex organs systems such as digestive and nervous system.
ANS: The most obvious and complicated feature of all living organisms is the ability to sense their surroundings or environment and respond to these environmental stimuli. This is called responsiveness or irritability. It is the characteristic that enables living organisms to survive and thrive in their environment.
8. Identify the incorrect statement:
(1) Biological names are generally in Latin and written in italics. They are Latinised or derived from Latin irrespective of their origin.
(2) The first word in a biological name represents the genus while the second component denotes the specific epithet.
(3) Both the words in a biological name, when handwritten, are separately underlined, or printed in italics to indicate their vernacular origin.
(4) The first word denoting the genus starts with a capital letter while the specific epithet starts with a small letter.
ANS: The incorrect statement is option 3, i.e., Both the words in a biological name, when handwritten, are separately underlined, or printed in italics to indicate their vernacular origin. Only the entire biological name, both genus, and specific epithet, is either italicized or underlined. This is to indicate that it is a scientific name.
9. The scientific term for biological classification categories is the:
(1) Species
(2) Taxon
(3) Phylum
(4) Domain
ANS: The scientific term for biological classification categories is Taxon. It refers to any group of organisms that are classified together based on shared characteristics.
10. What is meant by the "species problem"?
(1) The exact definition of species is still controversial.
(2) The exact mechanisms of speciation is not known.
(3) The number of species present is much more than identified species.
(4) The extinction of species is taking place at an alarming rate.
ANS: The "species problem" refers to the fact that the exact definition of species is still controversial. There are several different definitions of species, and scientists often have difficulty determining which one to use in different situations. This leads to confusion and disagreements when trying to identify and classify different species.
11. Which of the following taxonomic categories are correctly matched to their standard termination of names with respect to biological classification of plants?
I Division: - phyta
II Class: - opsida
III Order: - ales
IV Family: - idae
(1) I, II, IV
(2) I, II, III
(3) II, III, IV
(4) I, II, III, IV
ANS: The correct answer is option 1, i.e., I, II, IV. The standard terminations of names for biological classification of plants are: I - phytae, II - ophyta, III - ales, IV - aceae.
12. Consider the following statements:
I. Higher the taxa, more are the characteristics that members whithin the taxon share.
II. Lower the category, greater is the difficulty of determining the relationship to other taxa at the same level.of the two statements:
(1) I is true but II is false
(2) I is false but II is true
(3) Both I and II are true
(4) Both I and II are false
ANS: The correct answer is option 3, i.e., Both I and II are true. Higher taxa, such as kingdom, phylum, or class, have more characteristics that members within the taxon share. Lower categories, such as genus or species, have fewer shared characteristics, making it more difficult to determine relationships to other taxa at the same level.
Comments
Post a Comment