Ques:Q: Composite cones are steep-sided, cone-shaped types of what, which produce explosive eruptions? Read this paragraph and choose the correct option from the provided answers: Composite cones are steep sided, cone shaped volcanoes that produce explosive eruptions. Choices: - earthquakes - mountains - craters - volcanoes A:

Ans:volcanoes
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Ques:Q: Sexual reproduction is the combination of (usually haploid) reproductive cells from two individuals to form a third (usually diploid) unique offspring. sexual reproduction produces offspring with novel combinations of what? Read this paragraph and choose the correct option from the provided answers: Sexual Reproduction Sexual reproduction is the combination of (usually haploid) reproductive cells from two individuals to form a third (usually diploid) unique offspring. Sexual reproduction produces offspring with novel combinations of genes. This can be an adaptive advantage in unstable or unpredictable environments. As humans, we are used to thinking of animals as having two separate sexesmale and femaledetermined at conception. However, in the animal kingdom, there are many variations on this theme. Hermaphroditism Hermaphroditism occurs in animals where one individual has both male and female reproductive parts. Invertebrates such as earthworms, slugs, tapeworms and snails, shown in Figure 43.5, are often hermaphroditic. Hermaphrodites may selffertilize or may mate with another of their species, fertilizing each other and both producing offspring. Self fertilization is common in animals that have limited mobility or are not motile, such as barnacles and clams. Choices: - features - cells - phenotypes - genes A:

Ans:genes
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Ques:Q: What does the megaspore mother cell produce after meiosis division? Read this paragraph and choose the correct option from the provided answers: Watch this video (http://openstaxcollege. org/l/pollen_release) to see a cedar releasing its pollen in the wind. Female Gametophyte The female cone also has a central axis on which bracts known as megasporophylls (Figure 32.10) are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium. Choices: - four diploid megaspores - two diploid megapores - two haploid megaspores - four haploid megaspores A:

Ans:four haploid megaspores
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Ques:Q: Thermodynamics do not give us any insight into what attribute of spontaneous processes? Read this paragraph and choose the correct option from the provided answers: It should be noted that just because a process is spontaneous does not mean that it occurs quickly. The rusting of iron is a spontaneous process that takes place over a long period of time. The combustion of gasoline in oxygen (also a spontaneous process) is extremely fast when provided with a spark, but gasoline can be stored in air for quite a while without spontaneously combusting. Thermodynamics predicts the direction in which a reaction will eventually proceed, but it does not tell us anything about the rate at which the reaction occurs. The rate of a reaction depends on many factors, including activation energy, temperature, concentration, and the presence or absence of a catalyst. Chemical kinetics focuses on the pathway between reactants and products, while thermodynamics considers only the difference between the initial and final states. Choices: - acceleration - decrease - increase - rate A:

Ans:
rate
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