Q: Answer the following question given this paragraph: Unsaturated hydrocarbons that contain at least one double bond are called alkenes . The name of a specific alkene always ends in ene , with a prefix indicating the number of carbon atoms. Figure below shows the structural formula for the smallest alkene. It has just two carbon atoms and is named ethene. Ethene is produced by most fruits and vegetables. It speeds up ripening and also rotting. Figure below shows the effects of ethene on bananas. Q: What is the name for unsaturated hydrocarbons that contain at least one double bond? A:

OPTIONS:
- lipids
- acids
- enzymes
- alkenes

A: alkenes

Q: Answer the following question given this paragraph: Gingkophytes The single surviving species of the gingkophytes group is the Gingko biloba (Figure 26.11). Its fan-shaped leavesunique among seed plants because they feature a dichotomous venation patternturn yellow in autumn and fall from the tree. For centuries, G. biloba was cultivated by Chinese Buddhist monks in monasteries, which ensured its preservation. It is planted in public spaces because it is unusually resistant to pollution. Male and female organs are produced on separate plants. Typically, gardeners plant only male trees because the seeds produced by the female plant have an off-putting smell of rancid butter. Q: Why is gingko biloba planted in public spaces? A:

OPTIONS:
- for xeriscaping
- self-pollinating
- self-containing
- resistant to pollution

A: resistant to pollution

Q: Answer the following question given this paragraph: Precipitation maps show the amount of rainfall in different areas. Q: Precipitation maps show the amount of what in different areas? A:

OPTIONS:
- population
- heat
- geographical variety
- rainfall

A: rainfall

Q: Answer the following question given this paragraph: Natural selection occurs when there are differences in fitness among members of a population. As a result, some individuals pass more genes to the next generation. This causes allele frequencies to change. Q: What occurs when there are differences in fitness among a population? A:

OPTIONS:
- evolution
- natural process
- natural change
- natural selection

A:
natural selection