Answer the following question given this paragraph: Some of the most interesting kinds of evidence for evolution are body parts that have lost their use through evolution ( Figure below ). For example, most birds need their wings to fly. But the wings of an ostrich have lost their original use. Structures that have lost their use through evolution are called vestigial structures . They provide evidence for evolution because they suggest that an organism changed from using the structure to not using the structure, or using it for a different purpose. Q: Structures that have lost their use through evolution are called _______ Choices: - primordial structures - residual structures - symbiotic structures - vestigial structures A:
vestigial structures
(Question)
Answer the following question given this paragraph: Due to the difference in the distribution of charge, water is a polar molecule. Q: Due to the difference in the distribution of charge, water is what type of molecule? Choices: - ionic - uneven - crooked - polar A:
(Answer)
polar
Ques: Answer the following question given this paragraph: third phase of mitosis during which sister chromatids separate and move to opposite poles of the cell. Q: Sister chromatids separate and move to opposite poles of the cell in the third phase of what process? Choices: - cytokinesis - epistasis - meiosis - mitosis A:
Ans: mitosis
(Q).
Answer the following question given this paragraph: The cis isomer has the two single hydrogen atoms on the same side of the molecule, while the trans isomer has them on opposite sides of the molecule. In both molecules, the bonding order of the atoms is the same. In order for geometric isomers to exist, there must be a rigid structure in the molecule to prevent free rotation around a bond. If the double bond in an alkene was capable of rotating, the two geometric isomers above would not exist. In addition, the two carbon atoms must each have two different groups attached in order for there to be geometric isomers. Propene has no geometric isomers because one of the carbon atoms has two single hydrogens bonded to it. Q: A molecule has two structures that can be generated. what is this called? Choices: - resonance hybrids - congruence - ethnocentrism - isomerism A:
(A).
isomerism
Ques:Answer the following question given this paragraph: Electrical energy is useful to us mostly because it is easy to transport and can be easily converted to or from other forms of energy. Of course, conversion involves wast, typically as heat. Q: What type of energy is useful to humans because it's ease of transport and conversion to other forms of energy? Choices: - physical - potential - heat - electrical A:

Ans:electrical
Question: Answer the following question given this paragraph: The energy in sunlight, or solar energy, can be used to heat homes. It can also be used to produce electricity in solar cells. However, solar energy may not be practical in areas that are often cloudy. Q: The energy in sunlight is also known as what kind of energy? Choices: - kinetic energy - potential energy - geothermal energy - solar energy A:
Answer:
solar energy