Answer the following question given this paragraph: Even though large life forms have been very successful on Earth, most of the life forms on Earth today are still prokaryotessmall, relatively simple single-celled organisms. Fossils indicate that many organisms that lived long ago are extinct. Extinction of species is common; in fact, it is estimated that 99% of the species that have ever lived on Earth no longer exist. Q: An estimated 99 percent of the species that have ever lived on earth no longer exist, showing that what event is common? Choices: - accumulation - over fishing - pollution - extinction A:
extinction
(Question)
Answer the following question given this paragraph: Q: The release of mature eggs that occurs at the midpoint of each cycle is called? Choices: - fertilization - induction - semination - ovulation A:
(Answer)
ovulation
Ques: Answer the following question given this paragraph: In some cases, a population of one species disperses throughout an area, and each finds a distinct niche or isolated habitat. Over time, the varied demands of their new lifestyles lead to multiple speciation events originating from a single species, which is called adaptive radiation. From one point of origin, many adaptations evolve causing the species to radiate into several new ones. Island archipelagos like the Hawaiian Islands provide an ideal context for adaptive radiation events because water surrounds each island, which leads to geographical isolation for many organisms (Figure 11.16). The Hawaiian honeycreeper illustrates one example of adaptive radiation. From a single species, called the founder species, numerous species have evolved, including the eight shown in Figure 11.16. Q: In adaptive radiation, what is the name of the initial species that then subsequently becomes multiple other ones? Choices: - pioneer - father - Mother - founder A:
Ans: founder
(Q).
Answer the following question given this paragraph: Q: Plant cuttings are an example of what type of reproduction? Choices: - homosexual - heterosexual - autosexual - asexual A:
(A).
asexual
Ques:Answer the following question given this paragraph: Some vitamins are produced in the body. For example, vitamin D is made in the skin when it is exposed to sunlight. Vitamins B 12 and K are produced by bacteria that normally live inside the body. Most other vitamins must come from foods. Foods that are good sources of vitamins include whole grains, vegetables, fruits, and milk ( Table above ). Q: Being exposed to sunlight will produce what vitamin in the skin? Choices: - B-complex - vitamin A - Vitamin E - vitamin d A:

Ans:vitamin d
Answer the following question given this paragraph: Let's briefly review the basics of covalent bonding as they pertain to carbon. Carbon has four valence electrons, which have a 2s 2 2p 2 configuration in isolated carbon atoms. These four electrons allow carbon to form four covalent bonds, which can mean four single bonds or some combination of single, double, and triple bonds. Q: How many valence electrons can be found in a carbon atom? Choices: - five - three - One - four A:
four