Bio 1 Warm-up Quiz #5

The graph shows that as time progresses, the population of crabs at point A is reaching a plateau, indicating that the population growth is slowing down and stabilizing. This suggests that the population is approaching its carrying capacity, which is the maximum number of individuals the environment can sustain. Therefore, the statement "The population is stabilizing as it approaches the carrying capacity" best describes what is happening at point A.

Nucleic acids store and transmit genetic information. They are composed of DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), which are responsible for carrying and transmitting genetic instructions for the development, functioning, and reproduction of all living organisms. Nucleic acids contain the genetic code in the form of sequences of nucleotides, which are the building blocks of DNA and RNA. This genetic information is crucial for the synthesis of proteins and the overall functioning of cells and organisms.

If a waterborne bacteria caused the death of most of the minnow population, it would result in a decrease in both perch and hawk populations. This is because minnows are a primary food source for perch, and perch are a primary food source for hawks. With a decrease in the minnow population, there would be less food available for perch, causing their population to decrease. As a result, there would also be less food available for hawks, leading to a decrease in their population as well.

Water is a polar molecule due to its bent shape and the difference in electronegativity between oxygen and hydrogen atoms. This polarity allows water to form hydrogen bonds with other polar molecules. Polar pigments, being polar in nature, would be attracted to the slightly positive and negative ends of water molecules, making water a good solvent for them. On the other hand, metals, non-polar oils, and unreactive noble gases do not have the necessary polarity to form strong interactions with water molecules, making water a poor solvent for these substances.

Water is a polar solvent, meaning it can dissolve polar substances but not non-polar substances. Adhesion refers to water's ability to stick to other substances, while cohesion refers to water's ability to stick to itself. Water also has a high specific heat, meaning it can absorb and retain a large amount of heat without a significant change in temperature. Therefore, the correct answer is "Non-polar solvent" as it is not a property of water.

The molecule illustrated here is a monomer of a nucleic acid. Nucleic acids are polymers made up of monomers called nucleotides. These monomers consist of a sugar molecule (in this case, the molecule shown in the illustration), a phosphate group, and a nitrogenous base. Nucleic acids, such as DNA and RNA, play a crucial role in storing and transmitting genetic information in living organisms.

Water has the property of cohesion because the positive region of one water molecule is attracted to the negative region of another water molecule. This attraction is caused by the polarity of water molecules, where the oxygen atom is slightly negative and the hydrogen atoms are slightly positive. This polarity allows water molecules to form hydrogen bonds with each other, creating a cohesive force that holds them together.

The energy in food needs to be converted into a usable form for cells. The molecule used by cells for energy transfer is ATP (adenosine triphosphate). ATP is a high-energy molecule that is produced during cellular respiration and can be readily used by cells to carry out various metabolic processes. It acts as a "currency" for energy transfer within cells, providing the necessary energy for cellular activities.

Water (H2O) is an example of a molecule whose atoms are held together by covalent bonds. In a covalent bond, two atoms share electrons in order to achieve a stable electron configuration. In the case of water, the oxygen atom shares electrons with two hydrogen atoms, forming two covalent bonds. This sharing of electrons allows the atoms to be held together in a stable molecule.

Nucleic acids are the biological macromolecules that contain nitrogen bases. These nitrogen bases, namely adenine (A), thymine (T), cytosine (C), guanine (G), and uracil (U), are the building blocks of DNA and RNA. Nucleic acids play a crucial role in storing and transmitting genetic information in living organisms. Carbohydrates, lipids, and saturated fatty acids do not contain nitrogen bases and do not have the same genetic function as nucleic acids.