Science Practice Quiz 65

Q1.What is the initial structure formed when cells removed from the growing tip of a plant are placed in an artificial medium during tissue culture?

A. A mature plantlet B. A fully developed root system C. A small group of cells or callus D. A flower bud

Q2.In tissue culture, what is added to the medium to promote the growth and differentiation of the callus?

A. Antibiotics B. Pesticides C. Hormones D. Sugars only

Q3.Which of the following is an advantage of using tissue culture for plant propagation?

A. It requires very large spaces. B. It produces plants with varied genetic material. C. Many plants can be grown from one parent in disease-free conditions. D. It is only suitable for wild plants.

Q4.What are the tiny blob-on-a-stick structures in Rhizopus called, and what do they contain for reproduction?

A. Hyphae, containing roots B. Sporangia, containing spores C. Buds, containing leaves D. Callus, containing plantlets

Q5.What protects the spores of Rhizopus until they come into contact with a moist surface and can begin to grow?

A. A thin membrane B. A sugary coating C. Thick walls D. A layer of hyphae

Q6.In the context of potato propagation, which part of a potato piece is responsible for giving rise to fresh green shoots and roots?

A. The smooth surface without any features B. The portion containing a notch or bud C. Only the cut edges of the potato D. The internal starchy part

Q7.What is a general characteristic of new individuals produced through reproductive processes?

A. They are identical to their parents. B. They are completely different from their parents. C. They are similar to their parents but with subtle differences. D. They are always weaker than their parents.

Q8.Which reproductive process is known to maximize the number of successful variations?

A. Asexual reproduction B. Sexual reproduction C. Budding D. Fragmentation

Q9.What is typically observed regarding variations among individual plants in a field of sugarcane?

A. Quite distinct variations are visible. B. A wide range of successful variations. C. Very little variations are found. D. Variations are only visible in different generations.

Q10.What kind of variations are visible among different individuals in sexually reproducing animals like human beings?

A. No variations at all. B. Only minor, insignificant differences. C. Quite distinct variations. D. Variations that are always detrimental.

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Science Practice Quiz 65