Answer the following question given this paragraph: 30.4 Leaves Leaves are the main site of photosynthesis. A typical leaf consists of a lamina (the broad part of the leaf, also called the blade) and a petiole (the stalk that attaches the leaf to a stem). The arrangement of leaves on a stem, known as phyllotaxy, enables maximum exposure to sunlight. Each plant species has a characteristic leaf arrangement and form. The pattern of leaf arrangement may be alternate, opposite, or spiral, while leaf form may be simple or compound. Leaf tissue consists of the epidermis, which forms the outermost cell layer, and mesophyll and vascular tissue, which make up the inner portion of the leaf. In some plant species, leaf form is modified to form structures such as tendrils, spines, bud scales, and needles. Q: What part of the plant is the main site of photosynthesis? Choices: - soil - root - stem - leaf A:
leaf
Answer the following question given this paragraph: From the kidneys, urine enters the ureters. These are two muscular tubes that carry urine to the urinary bladder. Contractions of the muscles of the ureters move the urine along by peristalsis. The urinary bladder is a sac-like organ that stores urine. When the bladder is about half full, a sphincter relaxes to let urine flow out of the bladder and into the urethra. The urethra is a muscular tube that carries urine out of the body through another sphincter. The process of urine leaving the body is called urination. The second sphincter and the process of urination are normally under conscious control. Q: What is a sac-like organ that stores urine? Choices: - the colon - the urinary liver - the small intestine - the urinary bladder A:
the urinary bladder
Q: Answer the following question given this paragraph: Q: What kind of cleavage do mammalian eggs exhibit? Choices: - cocklebur - Meroblastic - spicule - holoblastic A:
A: holoblastic
Question: Answer the following question given this paragraph: Q: Photographs of the heat emitted by an object are called what? Choices: - radio images - variable images - cosmic images - thermal images A:
Answer: thermal images
*Question*
Answer the following question given this paragraph: Q: What part of a plant protects the plant cell, maintains its shape, and prevents excessive uptake of water? Choices: - chloroplasm - stem - root - wall A:
**Answer**
wall
Q: Answer the following question given this paragraph: Variation and Adaptation Natural selection can only take place if there is variation, or differences, among individuals in a population. Importantly, these differences must have some genetic basis; otherwise, selection will not lead to change in the next generation. This is critical because variation among individuals can be caused by non-genetic reasons, such as an individual being taller because of better nutrition rather than different genes. Genetic diversity in a population comes from two main sources: mutation and sexual reproduction. Mutation, a change in DNA, is the ultimate source of new alleles or new genetic variation in any population. An individual that has a mutated gene might have a different trait than other individuals in the population. However, this is not always the case. A mutation can have one of three outcomes on the organisms' appearance (or phenotype):. Q: Genetic diversity in a population comes from two main sources - sexual reproduction and what else? Choices: - radiation - education - pathogen - mutation A:
A: mutation