Correct Answer: C) xerophytes

Explanation

This question is asking about plants that can survive in places where there is limited water supply. The options given are bryophytes, mesophytes, xerophytes, hydrophytes, and pteridophytes. Out of these options, the correct answer is xerophytes. Xerophytes are plants that have adapted to survive in environments with limited water supply, such as deserts. They have special features that help them conserve water, such as thick cuticles on their leaves to reduce water loss through transpiration, and deep roots to access water deep in the ground. Some xerophytes also have the ability to store water in their tissues. In contrast, mesophytes are plants that typically grow in environments with moderate water supply, such as forests and grasslands. Hydrophytes are plants that live in aquatic environments and are adapted to living in water. Bryophytes and pteridophytes are both groups of non-flowering plants, but they do not necessarily have adaptations for surviving in dry environments. Overall, xerophytes are plants that have adapted to living in places with limited water supply, making them able to survive in places where other plants would not be able to grow.

Correct Answer: B) Maintenance of internal environment of an organism

Explanation

The question is asking about the definition of homeostasis. Homeostasis is the maintenance of a stable internal environment in an organism despite changes in the external environment. This means that the organism tries to keep its internal conditions, such as temperature, pH, and glucose levels, within a narrow range that is optimal for its survival. Option A states that homeostasis involves the regulation of both external and internal conditions of organisms. Although organisms do regulate their external conditions to some extent, this is not the definition of homeostasis. Option B is correct. It correctly defines homeostasis as the maintenance of the internal environment of an organism. Option C states that homeostasis involves the maintenance of both internal and external environments of an organism. This is not the correct definition of homeostasis as it only involves the maintenance of the internal environment. Option D states that homeostasis involves the regulation of the chemical environment of an organism. Although homeostasis does involve the regulation of chemicals in the body, this is not a complete definition of homeostasis. In summary, the correct definition of homeostasis is the maintenance of a stable internal environment in an organism despite changes in the external environment.

Correct Answer: B. chewing

Explanation

Grasshoppers are herbivorous insects that primarily feed on plant material. Their mouthparts are well adapted for chewing, allowing them to consume various parts of plants, such as leaves, stems, and flowers.The mouthparts of a grasshopper consist of several structures that work together during feeding: Mandibles, Maxillae and Labium and Labrum

Correct Answer: C. proteins

Correct Answer: D. Their large numbers and one cell-thick walls enables them to provide a large surface area through which materials can be exchanged between the blood and the body cells.

Correct Answer: B. drinking contaminated water

Correct Answer: C. an oxygen carrying pigment

Correct Answer: C) Adrenal gland

Explanation

The question is asking about the hormone that helps to strengthen the muscles of a person when they are in danger. The options are thyroid gland, pancreas, adrenal gland, and spleen. The correct answer is option C, which is the adrenal gland. The adrenal gland is a gland located above the kidney that secretes various hormones, including adrenaline. Adrenaline, also known as epinephrine, is a hormone that is released in response to stress or danger. When adrenaline is released, it increases heart rate and blood pressure, and it also causes the muscles to contract. This helps the body to prepare for a fight or flight response, which is the body's way of dealing with danger or stress. The thyroid gland, on the other hand, produces hormones that regulate metabolism. The pancreas produces insulin, which regulates blood sugar levels. The spleen is an organ that helps to filter blood and produces some immune cells. In summary, the correct answer to this question is option C, adrenal gland, because it secretes the hormone adrenaline, which helps to strengthen muscles during times of danger.

Correct Answer: D. Breaks dormancy and starts to grow

Explanation

Germination refers to the process by which a seed breaks dormancy and starts to grow into a new plant. Germination occurs when a seed is exposed to favorable environmental conditions, including proper moisture, oxygen availability, and suitable temperature.

Correct Answer: D) ptyalin

Explanation

In the human body, digestion of starch begins in the mouth. The enzyme responsible for this is called ptyalin, which is secreted by the salivary glands. Ptyalin breaks down starch into smaller molecules called maltose. This process is important because it allows the body to absorb the nutrients from the starch in the food we eat. The breakdown of starch continues in the small intestine with the help of other enzymes. The correct answer to the question is Option D: Ptyalin. This enzyme is also known as salivary amylase. Option A, amylase, is a broad term that refers to enzymes that break down starch, but ptyalin specifically refers to the enzyme found in saliva. Lipase, Option B, breaks down lipids or fats and is not involved in the breakdown of starch. Pepsin, Option C, is an enzyme found in the stomach that breaks down proteins. Trypsin, Option E, is another enzyme involved in protein digestion and is found in the small intestine. In summary, the enzyme responsible for starting the digestion of starch in humans is ptyalin or salivary amylase, which is secreted by the salivary glands in the mouth. This enzyme breaks down starch into maltose, allowing the body to absorb nutrients. The other options listed in the question are not involved in the digestion of starch.