Ques: Q: For fertilization to occur in angiosperms, pollen has to be transferred to the stigma of what? Read this paragraph and choose the correct option from the provided answers: 32.2 Pollination and Fertilization For fertilization to occur in angiosperms, pollen has to be transferred to the stigma of a flower: a process known as pollination. Gymnosperm pollination involves the transfer of pollen from a male cone to a female cone. When the pollen of the flower is transferred to the stigma of the same flower, it is called self-pollination. Cross-pollination occurs when pollen is transferred from one flower to another flower on the same plant, or another plant. Cross-pollination requires pollinating agents such as water, wind, or animals, and increases genetic diversity. After the pollen lands on the stigma, the tube cell gives rise to the pollen tube, through which the generative nucleus migrates. The pollen tube gains entry through the micropyle on the ovule sac. The generative cell divides to form two sperm cells: one fuses with the egg to form the diploid zygote, and the other fuses with the polar nuclei to form the endosperm, which is triploid in nature. This is known as double fertilization. After fertilization, the zygote divides to form the embryo and the fertilized ovule forms the seed. The walls of the ovary form the fruit in which the seeds develop. The seed, when mature, will germinate under favorable conditions and give rise to the diploid sporophyte. Choices: - stem - leaf - root - flower A:
Ans: flower

Ques: Q: What theory says stresses build on both sides of a fault? Read this paragraph and choose the correct option from the provided answers: Elastic rebound theory. Stresses build on both sides of a fault. The rocks deform plastically as seen in Time 2. When the stresses become too great, the rocks return to their original shape. To do this, the rocks move, as seen in Time 3. This movement releases energy, creating an earthquake. Choices: - Geiger theory - seismic load theory - Big Bang theory - elastic rebound theory A:
Ans: elastic rebound theory

Ques: Q: What term is used to describe the energy reserve carbohydrate of animals? Read this paragraph and choose the correct option from the provided answers: Glycogen Glycogen is the energy reserve carbohydrate of animals. Practically all mammalian cells contain some stored carbohydrates in the form of glycogen, but it is especially abundant in the liver (4%8% by weight of tissue) and in skeletal muscle cells (0.5%1.0%). Like starch in plants, glycogen is found as granules in liver and muscle cells. When fasting, Saylor URL: http://www. saylor. org/books. Choices: - lactose - fructose - sucrose - glycogen A:
Ans: glycogen

Ques: Q: What is anything that causes cancer called? Read this paragraph and choose the correct option from the provided answers: A carcinogen is anything that causes cancer. Most carcinogens produce mutations in genes that control the cell cycle. Choices: - chemical - pesticide - bacteria - carcinogen A:
Ans:
carcinogen