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UPSC Exam  >  UPSC Tests  >  Test: Bacteria, Virus, Algae, Fungi & Lichens - UPSC MCQ

Test: Bacteria, Virus, Algae, Fungi & Lichens - UPSC MCQ


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10 Questions MCQ Test - Test: Bacteria, Virus, Algae, Fungi & Lichens

Test: Bacteria, Virus, Algae, Fungi & Lichens for UPSC 2024 is part of UPSC preparation. The Test: Bacteria, Virus, Algae, Fungi & Lichens questions and answers have been prepared according to the UPSC exam syllabus.The Test: Bacteria, Virus, Algae, Fungi & Lichens MCQs are made for UPSC 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Bacteria, Virus, Algae, Fungi & Lichens below.
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Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 1
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What is the main difference between bacteria and viruses?

Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 1
Bacteria and viruses are both microorganisms, but one of the key differences between them is their ability to reproduce. Bacteria are single-celled organisms that can reproduce independently through binary fission, a form of asexual reproduction. In contrast, viruses are not considered living organisms and cannot reproduce on their own. Instead, viruses require a host cell to replicate and multiply. They inject their genetic material into a host cell and hijack the host's cellular machinery to make copies of themselves. This fundamental difference in reproduction is what sets bacteria and viruses apart.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 2
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Which of the following is a characteristic of thallophytes?

Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 2
Thallophytes, which include algae, fungi, bacteria, slime molds, and some bryophytes, are characterized by the absence of well-developed vascular tissues. Vascular tissues like xylem and phloem, which are responsible for transporting water and nutrients in higher plants, are generally absent or poorly developed in thallophytes. This is one of the distinguishing features of thallophytes and sets them apart from higher plants.
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Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 3
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Which of the following is an example of a symbiotic relationship involving fungi and algae?

Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 3
Lichen is an example of a symbiotic relationship between fungi and either a cyanobacterium or algae. In lichen, the fungal partner provides a protective environment for the photosynthetic partner (cyanobacterium or algae), which can carry out photosynthesis. In return, the photosynthetic partner provides nutrients to the fungal partner. This mutualistic association allows lichen to thrive in various environments, including harsh ones like arctic tundra.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 4
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Which type of stem modification is exemplified by the potato plant?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 4
The potato plant exhibits stem modification known as a "tuber." Tubers are swollen, underground stems that serve as storage organs for food. In the case of potatoes, the tubers store starch, which the plant can utilize for energy and growth when needed. Potatoes are a common example of plants with tuberous stem modifications.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 5
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What is the primary function of roots in plants?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 5
The primary function of roots in plants is to anchor the plant securely in the soil, providing stability and support. Additionally, roots are responsible for absorbing water and essential minerals from the soil, which are then transported to the rest of the plant. While roots play a role in nutrient storage, their fundamental function is to ensure the plant's structural integrity and facilitate its water and mineral uptake.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 6
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Which of the following stem modifications is specialized for climbing in plants?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 6
Tendrils are specialized stem modifications in plants that are adapted for climbing. Tendrils are slender, elongated structures that plants use to attach to a support and climb upwards. They often coil around objects to provide stability and allow the plant to reach for sunlight. Examples of plants with tendrils include passionflowers and certain types of peas.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 7
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Which plant group is characterized by the absence of vascular tissues and the presence of a thallus?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 7
Bryophytes, such as mosses and liverworts, are characterized by the absence of true vascular tissues (xylem and phloem) and the presence of a thallus-like structure. The thallus is a simple, undifferentiated body without distinct roots, stems, or leaves. Bryophytes are non-vascular plants that require a moist environment for reproduction.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 8
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Which type of stem modification involves the production of additional shoots from nodes above the ground?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 8
Stolons are stem modifications that involve the production of additional shoots from nodes above the ground. Stolons are often horizontal stems that grow along the soil surface and can give rise to new plants at their nodes. Plants like strawberries and certain grasses produce stolons as a means of vegetative propagation, allowing them to spread and form new individuals.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 9
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Which plant group is known for its floating roots that help in aeration and respiration?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 9
Some angiosperms, specifically those that inhabit aquatic environments, have specialized floating roots that aid in aeration and respiration. These roots help the plant obtain oxygen from the atmosphere, even when submerged in water. This adaptation allows these plants to thrive in wetland and aquatic habitats.
Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 10
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Which plant group includes naked seeded plants with vascular tissues and is often considered a fossil group?
Detailed Solution for Test: Bacteria, Virus, Algae, Fungi & Lichens - Question 10
Gymnosperms are a group of plants that produce naked seeds (seeds not enclosed in a fruit) and have well-developed vascular tissues. Gymnosperms are often considered a "fossil group" because they have ancient origins and include plants like conifers that have been around for a long time. The term "gymnosperm" means "naked seed," referring to the fact that the seeds are exposed on the surface of cone scales or other structures.
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