Tissues — Set 4
Biology · ऊतक · Questions 31–40 of 40
The most common and simplest permanent tissue found in plants is?
Correct Answer: D. Parenchyma
Parenchyma is composed of relatively unspecialized cells with thin cell walls. These cells are usually living and have large intercellular spaces. This tissue provides basic support and often serves as a site for food storage.
What is the main function of the 'Ciliated Epithelium' in the respiratory tract?
Correct Answer: A. Movement of mucus
Ciliated epithelium possesses hair-like projections called cilia on the outer surface of cells. In the respiratory tract, these cilia move rhythmically to push mucus and trapped dust particles out. This helps in keeping the lungs and airways clear of obstructions.
Which part of the neuron receives the incoming signals from other neurons?
Correct Answer: B. Dendrite
Dendrites are the short, branched extensions of a neuron that receive chemical signals. These signals are then converted into electrical impulses and sent to the cell body. The long axon then carries the impulse away from the cell body to the next neuron.
Which of the following is not a part of the xylem tissue?
Correct Answer: B. Sieve tubes
Sieve tubes are a specialized component of the phloem tissue, not the xylem. Tracheids and vessels are the main water-conducting elements in xylem. Xylem parenchyma is the only living component among the four xylem elements.
The type of epithelium found in the skin that prevents wear and tear is?
Correct Answer: C. Stratified squamous
Stratified squamous epithelium consists of several layers of cells to protect against mechanical injury. The skin is made of this tissue to handle constant friction and external contact. The outermost layers of these cells are often keratinized and dead.
Intercalary meristem is typically found in which part of the plant?
Correct Answer: C. Base of leaves or nodes
Intercalary meristem is located at the base of leaves or in the internodes of grasses. It facilitates the rapid growth of the stem and leaves after grazing by animals. It is considered a part of the primary meristem that was left behind by the apical meristem.
The red color of human blood is primarily due to the presence of?
Correct Answer: A. Hemoglobin
Hemoglobin is an iron-rich protein found in red blood cells that binds with oxygen. It gives blood its characteristic red color when oxygenated. Its primary role is to transport oxygen from the lungs to all body tissues.
Which simple plant tissue contains chlorophyll and performs photosynthesis?
Correct Answer: D. Chlorenchyma
Chlorenchyma is a specialized parenchyma tissue that contains chloroplasts. Its primary function is to perform photosynthesis in green stems and leaves. It is essential for the production of food in autotrophic organisms.
Which type of muscle cells are spindle-shaped and unstriated?
Correct Answer: C. Smooth muscle
Smooth muscle cells are long, uninucleated, and have pointed ends (spindle-shaped). They do not show the striations found in skeletal or cardiac muscles. They are found in the walls of internal organs like the stomach and bladder.
White blood cells (WBCs) in animals are primarily responsible for?
Correct Answer: C. Immune defense
White blood cells, or leukocytes, are the key components of the body's immune system. They protect the body against infectious diseases and foreign invaders. Unlike red blood cells, they are nucleated and can change their shape.