Kingdom Plantae includes all eukaryotic organisms that contain chlorophyll and are commonly called plants. Because of chlorophyll, these organisms are capable of performing photosynthesis and producing their own food using sunlight, carbon dioxide and water. Plants are therefore autotrophic organisms and play an important role as primary producers in ecosystems.
2. Some plants that are partially heterotrophic include:
Correct Answer: A
Most plants are autotrophic because they perform photosynthesis using chlorophyll. However, a few plants are partially heterotrophic. Insectivorous plants such as Nepenthes and Drosera trap insects to obtain nutrients like nitrogen. Parasitic plants such as Cuscuta depend partly or completely on other plants for nutrition. These adaptations help them survive in nutrient-poor environments.
3. Bladderwort and Venus flytrap are examples of:
Correct Answer: B
Bladderwort and Venus flytrap are well-known examples of insectivorous plants. These plants perform photosynthesis like other green plants but also trap and digest insects to obtain nutrients, especially nitrogen. This adaptation helps them survive in nutrient-poor soils where essential minerals are limited.
4. Cuscuta is an example of a:
Correct Answer: B
Cuscuta, commonly known as dodder, is a parasitic plant. It lacks sufficient chlorophyll and cannot produce its own food efficiently. Instead, it obtains nutrients from host plants by attaching to them using specialized structures called haustoria. Because it depends on another plant for nutrition, Cuscuta is classified as a parasitic plant.
5. Plant cells are characterized by:
Correct Answer: B
Plant cells have a eukaryotic organization with a well-defined nucleus and membrane-bound organelles. A prominent feature of plant cells is the presence of chloroplasts, which contain chlorophyll and perform photosynthesis. In addition, plant cells possess a rigid cell wall mainly composed of cellulose, which provides structural support and protection to the cell.
6. Which of the following groups are included in Kingdom Plantae?
Correct Answer: A
Kingdom Plantae includes a wide variety of plant groups that possess chlorophyll and perform photosynthesis. The major groups included in this kingdom are algae, bryophytes, pteridophytes, gymnosperms and angiosperms. These groups show increasing complexity in structure and reproduction from simple algae to highly developed flowering plants.
7. The life cycle of plants consists of two alternating phases called:
Correct Answer: B
The life cycle of plants shows an alternation of generations. It consists of two distinct phases: the diploid sporophytic phase and the haploid gametophytic phase. The sporophyte produces haploid spores through meiosis, while the gametophyte produces gametes. These two phases alternate with each other during the plant life cycle, ensuring both sexual reproduction and genetic variation.
8. In plants, the length of haploid and diploid phases and whether they are free-living or dependent:
Correct Answer: B
In the plant life cycle, both haploid (gametophytic) and diploid (sporophytic) phases occur. However, the duration of these phases and whether they are independent or dependent varies among different groups of plants. For example, in bryophytes the gametophyte is dominant, while in higher plants like angiosperms the sporophyte is dominant.
9. The phenomenon in which haploid and diploid phases alternate in the life cycle of plants is called:
Correct Answer: B
In plants, the life cycle includes two distinct phases: a haploid gametophytic phase and a diploid sporophytic phase. These two phases occur one after the other and alternate regularly during the life cycle. The length of each phase and whether they are independent or dependent varies among different plant groups. This biological phenomenon is called alternation of generations.
10. Kingdom Animalia is characterized by organisms that are:
Correct Answer: B
Kingdom Animalia includes multicellular eukaryotic organisms that obtain their food by consuming other organisms, making them heterotrophic. Unlike plants and fungi, animal cells do not have a cell wall. Their cells are specialized and organized into tissues and organs that perform different functions. This lack of cell wall and heterotrophic mode of nutrition are key characteristics of animals.
11. Animals depend directly or indirectly on ______ for food.
Correct Answer: B
Animals are heterotrophic organisms and cannot produce their own food through photosynthesis. Therefore, they depend on other organisms for nutrition. Plants are the primary producers in ecosystems because they make food using sunlight through photosynthesis. Animals either eat plants directly (herbivores) or eat other animals that feed on plants (carnivores). Thus, animals depend directly or indirectly on plants for food.
12. Animals digest their food in an ______ and store food reserves mainly as ______.
Correct Answer: A
Animals are heterotrophic organisms that ingest food and digest it inside the body within an internal cavity such as the digestive system. After digestion, nutrients are absorbed and used for energy and growth. Excess food is stored mainly in the form of glycogen in the liver and muscles, or as fat in specialized tissues. This storage helps animals obtain energy when food is not available.
13. The mode of nutrition in animals, where food is taken inside the body for digestion, is called:
Correct Answer: C
Animals follow a holozoic mode of nutrition, which involves ingestion of food followed by digestion, absorption and assimilation. In this process, food is taken into the body, broken down into simpler substances and then absorbed for energy, growth and repair. This type of nutrition is common in most animals, including humans.
14. The mode of nutrition in animals, where food is taken inside the body for digestion, is called:
Correct Answer: C
Animals follow a holozoic mode of nutrition, which involves ingestion of food followed by digestion, absorption and assimilation. In this process, food is taken into the body, broken down into simpler substances and then absorbed for energy, growth and repair. This type of nutrition is common in most animals, including humans.
15. Animals grow into adults with a:
Correct Answer: B
Animals follow a definite growth pattern. As they grow and develop, their bodies gradually reach a particular adult form with a definite shape and size. This pattern of growth is genetically controlled and differs from plants, which often continue to grow throughout their life without a fixed final size.
16. Higher animals show well developed:
Correct Answer: B
Higher animals possess well-developed sensory organs and neuromotor systems. These systems include specialized sense organs, nerves and muscles that help animals respond quickly to changes in their environment. Such mechanisms enable animals to detect stimuli, process information through the nervous system and produce appropriate movements or actions.
17. Most animals are capable of:
Correct Answer: B
Most animals have the ability to move from one place to another, a process called locomotion. This movement helps them search for food, escape from predators and find suitable habitats. Locomotion in animals occurs through the coordinated action of muscles and the nervous system. However, a few animals such as sponges may remain fixed in one place.
18. In animals, sexual reproduction usually involves:
Correct Answer: B
In most animals, sexual reproduction occurs through the fusion of male and female gametes during copulation. After fertilization, the zygote develops into an embryo through a series of cell divisions and differentiation. This process is known as embryological development, which ultimately leads to the formation of a new individual organism.