Answer the following question given this paragraph: 30.4 | Leaves By the end of this section, you will be able to: Identify the parts of a typical leaf Describe the internal structure and function of a leaf Compare and contrast simple leaves and compound leaves List and describe examples of modified leaves Leaves are the main sites for photosynthesis: the process by which plants synthesize food. Most leaves are usually green, due to the presence of chlorophyll in the leaf cells. However, some leaves may have different colors, caused by other plant pigments that mask the green chlorophyll. The thickness, shape, and size of leaves are adapted to the environment. Each variation helps a plant species maximize its chances of survival in a particular habitat. Usually, the leaves of plants growing in tropical rainforests have larger surface areas than those of plants growing in deserts or very cold conditions, which are likely to have a smaller surface area to minimize water loss. Q: The presence of what in leaf cells makes most leaves appear green? Choices: - hydrogen - sodium - carbonate - chlorophyll A:
chlorophyll
(Question)
Answer the following question given this paragraph: Natural gas is delivered to homes, where it is used for cooking and heating. Natural gas is also a major energy source for powering turbines to make electricity. Natural gas releases most of its energy as heat when it burns. The power plant is able to use this heat, either in the form of hot gases or steam, to spin turbines. The spinning turbines turn generators, and the generators create electricity. Q: What type of gas is delivered to homes to use for cooking and heating? Choices: - fluid gas - compounded gas - nuetralized gas - natural gas A:
(Answer)
natural gas
Ques: Answer the following question given this paragraph: Earth goes through regular changes in its position relative to the Sun. Its orbit changes slightly. Earth also wobbles on its axis of rotation. The planet also changes the tilt on its axis. These changes can affect Earth's temperature. Q: Earth goes through regular changes in its position relative to? Choices: - the moon - saturn - mars - the sun A:
Ans: the sun
(Q).
Answer the following question given this paragraph: Q: Single bonds allow the atoms they join to rotate freely about the what? Choices: - nucleus - electron shell - atomic orbit - bond axis A:
(A).
bond axis
Ques:Answer the following question given this paragraph: Heterotrophs cannot make their own food, so they must eat or absorb it. For this reason, heterotrophs are also known as consumers . Consumers include all animals and fungi and many protists and bacteria. They consume either autotrophs or other heterotrophs. Heterotrophs show great diversity and may appear far more fascinating than producers. But heterotrophs are limited by their utter dependence on those autotrophs which originally made the food. If plants, algae, and autotrophic bacteria vanished from Earth, animals, fungi, and other heterotrophs would soon disappear as well. All life requires a constant input of energy. Only autotrophs can transform that ultimate, solar source into the chemical energy in food which powers life, as shown in Figure below . Q: Because heterotrophs cannot make their own food, what are they called? Choices: - products - destroyers - customers - consumers A:

Ans:consumers
Answer the following question given this paragraph: The Menstrual Cycle Now that we have discussed the maturation of the cohort of tertiary follicles in the ovary, the build-up and then shedding of the endometrial lining in the uterus, and the function of the uterine tubes and vagina, we can put everything together to talk about the three phases of the menstrual cyclethe series of changes in which the uterine lining is shed, rebuilds, and prepares for implantation. The timing of the menstrual cycle starts with the first day of menses, referred to as day one of a woman's period. Cycle length is determined by counting the days between the onset of bleeding in two subsequent cycles. Because the average length of a woman's menstrual cycle is 28 days, this is the time period used to identify the timing of events in the cycle. However, the length of the menstrual cycle varies among women, and even in the same woman from one cycle to the next, typically from 21 to 32 days. Just as the hormones produced by the granulosa and theca cells of the ovary "drive" the follicular and luteal phases of the ovarian cycle, they also control the three distinct phases of the menstrual cycle. These are the menses phase, the proliferative phase, and the secretory phase. Q: The average length of a woman's menstrual cycle is what? Choices: - 19 days - 16 days - 5 days - 28 days A:
28 days