Q: Alkynes are what type of compound? Read this paragraph and choose the correct option from the provided answers: Unsaturated hydrocarbons that contain one or more triple bonds are called alkynes . The names of specific alkynes always end in yne and have a prefix for the number of carbon atoms. The structural formula in the Figure below represents the smallest alkyne, named ethyne, which has two carbon atoms and two hydrogen atoms (C 2 H 2 ). Ethyne is also called acetylene. It is burned in acetylene torches, like the one pictured in the Figure below . The flame of an acetylene torch is so hot that it can melt metal. Choices: - reversible hydrocarbons - proteins hydrocarbons - Split Hydrocarbons - unsaturated hydrocarbons A:
unsaturated hydrocarbons

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Q: What type of tissue is made up of cells that have the unique ability to contract? Read this paragraph and choose the correct option from the provided answers: Muscle tissue is made up of cells that have the unique ability to contract, or become shorter. Muscles attached to bones enable the body to move. Choices: - connective tissue - epithelial tissue - nervous tissue - muscle tissue A:
(Answer)
muscle tissue

Ques: Q: The human male and female reproductive cycles are controlled by the interaction of hormones from the hypothalamus and anterior pituitary with hormones from reproductive tissues and organs. in both sexes, the hypothalamus monitors and causes the release of hormones from this? Read this paragraph and choose the correct option from the provided answers: Hormonal Control of Reproduction The human male and female reproductive cycles are controlled by the interaction of hormones from the hypothalamus and anterior pituitary with hormones from reproductive tissues and organs. In both sexes, the hypothalamus monitors and causes the release of hormones from the anterior pituitary gland. When the reproductive hormone is required, the hypothalamus sends a gonadotropin-releasing hormone (GnRH) to the anterior pituitary. This causes the release of follicle stimulating hormone (FSH) and luteinizing hormone (LH) from the anterior pituitary into the blood. Although these hormones are named after their functions in female reproduction, they are produced in both sexes and play important roles in controlling reproduction. Other hormones have specific functions in the male and female reproductive systems. Male Hormones At the onset of puberty, the hypothalamus causes the release of FSH and LH into the male system for the first time. FSH enters the testes and stimulates the Sertoli cells located in the walls of the seminiferous tubules to begin promoting spermatogenesis (Figure 18.16). LH also enters the testes and stimulates the interstitial cells of Leydig, located in between the walls of the seminiferous tubules, to make and release testosterone into the testes and the blood. Testosterone stimulates spermatogenesis. This hormone is also responsible for the secondary sexual characteristics that develop in the male during adolescence. The secondary sex characteristics in males include a deepening of the voice, the growth of facial, axillary, and pubic hair, an increase in muscle bulk, and the beginnings of the sex drive. Choices: - thyroid gland - pineal gland - hypothalamus gland - anterior pituitary gland A:
Ans: anterior pituitary gland

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Q: What can water's high surface tension be attributed t? Read this paragraph and choose the correct option from the provided answers: Water has remarkable properties. Water expands when it freezes, even though all other substances contract. This means that in the winter ice on a pond or lake will float. Water has high surface tension because polar molecules tend to stick together. That's why drops stick together or some bugs can walk on the surface of a pond. Without water, life might not be able to exist on Earth. If it did exist, it would not be as diverse or as complex. Choices: - territorial molecules sticking together - molecules create a thin film-like substance - electric impulses in atoms - polar molecules sticking together A:
(A).
polar molecules sticking together

Ques:Q: What type of gas is produced by alcoholic fermentation of the glucose in corn or other plants? Read this paragraph and choose the correct option from the provided answers: Have your parents ever put corn in the gas tank of their car? They did if they used gas containing ethanol. Ethanol is produced by alcoholic fermentation of the glucose in corn or other plants. This type of fermentation also explains why bread dough rises. Yeasts in bread dough use alcoholic fermentation and produce carbon dioxide gas. The gas forms bubbles in the dough, which cause the dough to expand. The bubbles also leave small holes in the bread after it bakes, making the bread light and fluffy. Do you see the small holes in the slice of bread in Figure below ?. Choices: - methanol - ethyl - isopropyl - ethanol A:

Ans:ethanol

Ques:Q: What is a mutation that changes all or much of a particular chromosome? Read this paragraph and choose the correct option from the provided answers: A mutation that changes all or a large part of a chromosome is called a chromosomal mutation. This type of mutation tends to be very serious. Sometimes chromosomes are missing or extra copies are present. An example is the mutation that causes Down syndrome. In this case, there is an extra copy of one of the chromosomes. Choices: - kinetic mutation - biochemical mutation - muscular mutation - chromosomal mutation A:

Ans:
chromosomal mutation