Plants MCQ Quiz - Multiple Choice Questions Answers

Root hairs are the thin, elongated extensions of root epidermal cells that increase the surface area of the root for better absorption of water and nutrients from the soil. They are responsible for the majority of water and nutrient uptake in plants. Root caps, on the other hand, are protective coverings at the tip of the root that help in pushing through the soil. Vascular cambiums are meristematic tissues responsible for secondary growth in plants, while stomata are small openings on the surface of leaves that regulate gas exchange. Therefore, the correct answer is Root Hairs.

Water enters the plant through the roots. The roots of a plant have tiny hair-like structures called root hairs, which increase the surface area for absorption. These root hairs absorb water from the soil along with dissolved minerals and nutrients. The water then travels up through the stem and into the leaves, where it is used for photosynthesis and other metabolic processes. Therefore, the correct answer is root.

Option D is the correct answer because it is stated that "This structure is where the ovary is located." Since the question is asking for the location of the ovary, option D is the only option that indicates the correct location. Options A, B, and C do not provide any information about the location of the ovary.

Flowers have colorful petals to attract animals for pollination. The bright colors act as a visual signal to attract pollinators such as bees, butterflies, and birds. These animals are attracted to the flowers because they associate the colors with nectar and pollen, which serve as a food source. As the animals visit the flowers to feed, they inadvertently transfer pollen from one flower to another, aiding in the process of pollination and ensuring the reproduction of the plant.

Root hair in plants is responsible for absorbing water from the soil. This is a crucial function as water is essential for plant growth and survival. The roots have specialized structures such as root hairs that increase their surface area, allowing for efficient absorption of water and nutrients. Through a process called osmosis, water moves from an area of higher concentration in the soil to an area of lower concentration in the roots. This water is then transported to other parts of the plant, providing hydration and facilitating various physiological processes.

The letter A points to the petals because it is located at the center of the flower and is surrounded by the curved lines that represent the petals. The other letters (B, C, and D) do not have any connection or indication to the petals.

Leaves are responsible for the majority of photosynthesis in plants. They contain chlorophyll, a pigment that captures sunlight and converts it into energy through the process of photosynthesis. Leaves have a large surface area and are positioned to receive maximum sunlight exposure. They also have specialized structures called stomata that allow for gas exchange, which is necessary for photosynthesis. Additionally, leaves have a network of veins that transport water and nutrients to the cells involved in photosynthesis. Overall, the leaf's structure and function make it the primary site for photosynthesis in plants.

The process being shown here is pollination. Pollination is the transfer of pollen from the male reproductive organ (anther) to the female reproductive organ (stigma) of a flower. This process is essential for the fertilization and reproduction of flowering plants. It can occur through various means, including wind, water, or the assistance of animals like bees or butterflies.

Option B is the correct answer because an undeveloped plant refers to a seed, which is the structure that contains the embryo of a plant. It is the initial stage of a plant's life cycle before it starts to grow and develop into a mature plant. Options A and C do not represent an undeveloped plant structure.

The sun is not a way seeds are dispersed. Seeds are typically dispersed through various methods such as wind, water, or animals. The sun plays a crucial role in the growth and development of plants through photosynthesis, but it does not directly disperse seeds.

The roots of a plant have various functions, including absorbing water, anchoring the plant, and storing food. However, roots do not photosynthesize. Photosynthesis is the process by which plants convert sunlight into energy, and it primarily occurs in the leaves of the plant. Therefore, photosynthesis is not a function of the roots.

The root cap is located at the tip of the root, covering and protecting the root's growing tip. It is a structure made up of specialized cells that helps in the absorption of water and nutrients, as well as providing protection to the delicate root tissues as it pushes through the soil during growth.

Xylem is the correct answer because it is the plant tissue responsible for transporting water and minerals from the roots to the rest of the plant, including the stem. It consists of specialized cells that form tubes, allowing for the upward movement of water through capillary action. The other options listed (sloem, phloem, and tuber) are not involved in water transportation.

Option C is the correct answer because it states that "This is where the pollen is produced." This suggests that the location being referred to is where the process of pollen production takes place.

The correct answer is A. In plants, the seed coat is the protective outer covering of a seed. It is formed from the integuments of the ovule and provides protection to the embryo inside the seed. The seed coat helps to prevent desiccation, mechanical damage, and also acts as a barrier against pathogens.

The correct answer is B because it is the only option that is mentioned as a structure. Options A and C do not provide any information about the embryo.

Photosynthesis is the process by which plants convert sunlight into energy. Water and carbon dioxide are the two essential ingredients required for this process. Water is absorbed through the plant's roots and transported to the leaves, where it is combined with carbon dioxide from the air. In the presence of sunlight, chlorophyll in the plant's cells uses these two ingredients to produce glucose, a form of sugar, and oxygen as a byproduct. Therefore, water and carbon dioxide are necessary for photosynthesis to occur.

This picture taken with a high-powered microscope is mostly xylem. The image likely shows the vascular tissue of a plant, which is responsible for transporting water and nutrients from the roots to the rest of the plant. Xylem is a type of vascular tissue that consists of hollow, tube-like structures called vessels, which are visible in the image. These vessels are responsible for the upward movement of water in the plant.

Both pollination and germination are not functions of the stem. The stem primarily supports the leaves and helps transport sugar and water throughout the plant. Pollination refers to the transfer of pollen from the male reproductive organ to the female reproductive organ, which is typically carried out by wind, water, or animals. Germination, on the other hand, is the process by which a seed begins to grow and develop into a new plant. These functions are mainly carried out by other parts of the plant such as flowers and seeds, not the stem.

The female part of the flower is called the pistil. It is the reproductive structure of the flower that contains the ovary, style, and stigma. The ovary contains the ovules, which develop into seeds after fertilization. The style is the slender tube that connects the ovary to the stigma, where pollen is received. The stigma is the sticky or feathery structure at the top of the pistil, which traps pollen grains for fertilization.

Water is transported to the leaves through the xylem vessels. In the leaves, carbon dioxide is taken in through small openings called stomata. Through the process of photosynthesis, carbon dioxide combines with water in the presence of sunlight and chlorophyll to produce glucose, a type of sugar. This glucose is then used by the plant for energy and growth. Therefore, carbon dioxide is the correct answer as it combines with water to form sugar in the leaves.

The given flower structure is the stamen. The stamen is the male reproductive part of a flower, consisting of the filament and the anther. The filament holds up the anther, which is responsible for producing and releasing pollen. The stamen plays a crucial role in the process of pollination and fertilization in plants.

The tree was cut down in 2006.

The structure that protects the embryo is option A.

Section C of the root protects the newly formed cells from damage.

Structure C supplies food to the embryo.

Water has this effect on seed germination because it softens the seed coat. The seed coat acts as a protective layer around the seed, and it needs to be softened in order for the seed to absorb water and germinate. When the seed coat is softened, it allows water to penetrate the seed and initiate the germination process. This softening of the seed coat also allows the embryo within the seed to expand and grow, leading to the emergence of a new plant.

The variable during this experiment is water. In an experiment, a variable is the factor that is being tested or manipulated. In this case, the experiment likely involves studying the effect of water on the growth or germination of seeds. The other options listed, such as seeds, germination, and cotyledon width, are not variables in this context but rather components or outcomes that may be measured or observed during the experiment.

Phloem is responsible for transporting sugars, specifically glucose and sucrose, from the leaves to other parts of the plant, such as the roots, stems, and fruits. This process is known as translocation. The sugars are produced during photosynthesis in the leaves and are transported downwards to provide energy and nutrients to other plant tissues for growth and metabolism. Therefore, the correct answer is "sugar down."