Ques: Q: Some leaves are attached to the plant stem by a petiole. leaves that do not have a petiole and are directly attached to the plant stem are called this? Read this paragraph and choose the correct option from the provided answers: Structure of a Typical Leaf Each leaf typically has a leaf blade called the lamina, which is also the widest part of the leaf. Some leaves are attached to the plant stem by a petiole. Leaves that do not have a petiole and are directly attached to the plant stem are called sessile leaves. Small green appendages usually found at the base of the petiole are known as stipules. Most leaves have a midrib, which travels the length of the leaf and branches to each side to produce veins of vascular tissue. The edge of the leaf is called the margin. Figure 30.21 shows the structure of a typical eudicot leaf. Choices: - sheath leaves - globular leaves - transverse leaves - sessile leaves A:
Ans: sessile leaves

Ques: Q: What do all sound waves begin with? Read this paragraph and choose the correct option from the provided answers: All sound waves begin with vibrating matter. The vibrations generate longitudinal waves that travel through matter in all directions. Choices: - oscillating matter - talking matter - enclosing matter - vibrating matter A:
Ans: vibrating matter

Ques: Q: In plants, a high concentration of iaa inhibits what? Read this paragraph and choose the correct option from the provided answers: the bottom of the cell. In roots, a high concentration of IAA inhibits cell elongation. The effect slows growth on the lower side of the root, while cells develop normally on the upper side. IAA has the opposite effect in shoots, where a higher concentration at the lower side of the shoot stimulates cell expansion, causing the shoot to grow up. After the shoot or root begin to grow vertically, the amyloplasts return to their normal position. Other hypothesesinvolving the entire cell in the gravitropism effecthave been proposed to explain why some mutants that lack amyloplasts may still exhibit a weak gravitropic response. Choices: - Cell reproduction - same elongation - technology elongation - cell elongation A:
Ans: cell elongation

Ques: Q: The biological electron transport chain provides for an orderly, stepwise transfer of electrons. both nadh (reduced nicotinamide adenine dinucleotide) and fadh2 (reduced flavin adenine dinucleotide) are energy rich molecules that liberate a large amount of energy during what? Read this paragraph and choose the correct option from the provided answers: The biological electron transport chain provides for an orderly, stepwise transfer of electrons. Both NADH (reduced nicotinamide adenine dinucleotide) and FADH2 (reduced flavin adenine dinucleotide) are energyrich molecules that liberate a large amount of energy during oxidation. Free energy released during the transfer of electrons from either of these molecules to oxygen drives the synthesis of ATP (adenosine triphosphate) formed during respiratory metabolism. The reactions are as follows:. Choices: - extrapolation - conduction - evaporation - oxidation A:
Ans:
oxidation