1. Which of the following statements about prokaryotic and eukaryotic cells is not correct? ① Eukaryotic cells are alway

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1. Which of the following statements about prokaryotic and eukaryotic cells is not correct?
① Eukaryotic cells are always larger than prokaryotic cells.
② Eukaryotic cells always have a more complex structure than prokaryotic cells.
③ Only eukaryotic cells contain DNA. Prokaryotic cells contain RNA.
④ Eukaryotic cells appear in animals and plants. Bacteria are prokaryotic cells.
2. What is the basis for Darwin's conclusion that there is a difference in fertility?
① individual variation; It is the result of mixing the genes of the parents with the offspring.
② individual variation; Overproduction and competition of offspring
③ overproduction and competition of offspring; Males always compete for mating.
④ parents produce offspring that resemble themselves; Overproduction of offspring and competition for survival
⑤ Males always compete for mating; Parents produce offspring that resemble themselves.
3. Which of the following questions can be answered by a hypothesis-guided scientific method?
① How many types of tissue make up the kidney?
② Do people have free will?
③ How many leopards live in the Sabi Desert in South Africa?
④ Are there diseases caused by evil spirits?
⑤ Does vitamin biotin prevent birth defects?
4. Which of the following statements about atoms is not correct?
1 All atoms of an element have the same number of protons.
② Atoms whose outermost shell is not filled have the property of reacting with other atoms.
③ An atom is the smallest unit of matter that still retains the properties of an element.
④ The masses of protons and electrons are approximately equal.
The further the electron is from the nucleus, the greater its energy.
5. When a covalent bond is formed
① Protons move from one atom to another.
② Atoms participating in the reaction have a positive charge.
③ One atom transfers one or more electrons to another atom.
④ Ions are formed.
⑤ Two atoms share one or more electrons.
6. Which of the following statements about water is not correct?
① Due to covalent bonding, water has a particularly high surface tension.
② Water absorbs and stores a lot of heat with a very small temperature rise.
③ The cooling action due to vaporization is due to water molecules that evaporate a large amount of energy first.
④ Ice floats on water because water molecules move farther than when they are solid.
⑤ Water is a common solvent in our body.
7. For a covalent bond between two atoms to be polar?
① The electronegativity of one atom must be much greater than that of another atom.
② Both atoms must have the same electronegativity.
③ Both atoms must be of the same element.
④ The bond must be part of a tetrahedral molecule.
⑤ One element must be an anion.
8. Why is water a great solvent?
① As a polar molecule, it surrounds the polar ion molecule and dissolves it
② Forms ionic bonds with ions, hydrogen bonds with polar molecules, and hydrophobic interactions with non-polar molecules
③ Formation of hydrogen bonds between water molecules
④ The specific heat is high and the heat of vaporization is high.
⑤ The surface tension is high in wet form.
9. What is the polarity of a water molecule?
① Promote the formation of hydrogen bonds.
② Water helps to dissolve non-polar solutes.
③ It lowers the heat of vaporization and causes evaporative cooling.
④ It forms a crystal structure in liquid water.
⑤ All answers are correct.
10. Which of the following is not a common characteristic of living things?
① Organized system
② metabolism
③ Excretion
④ adaptation
⑤ evolution