Grade 11 Biology Quiz Questions And Answers

Explanation
The systemic system refers to the network of blood vessels that carries oxygenated blood away from the heart to various parts of the body. This blood supplies oxygen and nutrients to the body cells, allowing them to carry out their functions. Therefore, the correct answer is body cells.

Explanation
Angiosperms are a group of plants that produce flowers, making the statement "Angiosperms are plants that produce any kind of flower" true. Flowers are the reproductive structures of angiosperms, and they play a crucial role in pollination and seed production. This characteristic distinguishes angiosperms from other plant groups like gymnosperms, which do not produce flowers. Therefore, the statement accurately describes the defining feature of angiosperms.

Explanation
Bacteria are prokaryotes that can cause disease. Unlike viruses, which are not considered living organisms, bacteria are living cells that can reproduce and cause infections in humans and other organisms. Bacterial infections can range from mild to severe, and can be treated with antibiotics. Leukocytes are white blood cells that are part of the immune system and help fight infections, but they are not the actual cause of disease. Gametes, on the other hand, are reproductive cells and do not cause disease.

Explanation
The cell membrane serves as a dynamic boundary for cells, regulating the passage of nutrients through its selective permeability. It plays a vital role in maintaining internal homeostasis by allowing the intake of essential substances while preventing the entry of harmful ones. Additionally, the cell membrane is integral to cell recognition, facilitating communication between cells through molecular identifiers. This recognition is crucial for immune responses, tissue development, and overall coordination of cellular activities with the external environment.

Explanation
Dominant genes mask other genes that are present.

Explanation
Huntington's Chorea is a hereditary neurodegenerative disorder characterized by involuntary movements and cognitive decline. Spina Bifida is a congenital condition where the spine doesn't close properly during fetal development. These conditions are genetic disorders affecting the nervous system and physical development, respectively.

Explanation
Xylem and Phloem are indeed two major transport systems in plants. Xylem is responsible for transporting water and minerals from the roots to the rest of the plant, while Phloem transports sugars and other organic compounds from the leaves to other parts of the plant. These transport systems play a crucial role in distributing nutrients and maintaining the overall functioning of the plant.

Explanation
Erythrocytes are commonly known as red blood cells. They are responsible for carrying oxygen throughout the body and removing carbon dioxide. These cells have a unique structure that allows them to transport gases efficiently. They lack a nucleus and other organelles, enabling them to have more space for hemoglobin, the protein that binds to oxygen. The red color of these cells comes from the iron in hemoglobin. Overall, erythrocytes play a vital role in maintaining the body's oxygen levels and ensuring proper functioning of tissues and organs.

Explanation
The given symptoms, including modest weight gain, depression, and fatigue, are commonly associated with hypothyroidism. Hypothyroidism is a condition in which the thyroid gland does not produce enough thyroid hormone, resulting in a slower metabolism. This can lead to weight gain, as the body is not able to burn calories efficiently. Depression and fatigue are also common symptoms of hypothyroidism, as the lack of thyroid hormone can affect mood and energy levels. Therefore, these symptoms align with the diagnosis of hypothyroidism.

Explanation
Amensalism is a type of relationship in nature where one party negatively affects another while the first is not affected to any great extent, such as trees that secrete toxins inhibiting smaller plants. In this relationship, one organism negatively affects another organism while not receiving any benefit in return. This can be seen in situations where one organism secretes a substance that inhibits the growth or survival of another organism, giving the secreting organism little or no competitive advantage. This type of relationship is characterized by one party actively harming or inhibiting the other party, such as Penicillium Mold inhibiting bacterial growth.