Answer the following question given this paragraph: In eukaryotic cells, the nucleus divides before the cell itself divides. The process in which the nucleus divides is called mitosis. Before mitosis occurs, a cell's DNA is replicated. This is necessary so that each daughter cell will have a complete copy of the genetic material from the parent cell. How is the replicated DNA sorted and separated so that each daughter cell gets a complete set of the genetic material? To understand how this happens, you need to know more about chromosomes. Q: In eukaryotic cells, what divides before the cell itself divides? Choices: - electrons - cell wall - protons - nucleus A:
nucleus
(Question)
Answer the following question given this paragraph: Figure 29.17 shows a comet with two prominent tails. What most people do not know about the tails is that they always point away from the Sun rather than trailing behind the comet (like the tail of Bo Peep's sheep). Comet tails are composed of gases and dust evaporated from the body of the comet and ionized gas. The dust particles recoil away from the Sun when photons scatter from them. Evidently, photons carry momentum in the direction of their motion (away from the Sun), and some of this momentum is transferred to dust particles in collisions. Gas atoms and molecules in the blue tail are most affected by other particles of radiation, such as protons and electrons emanating from the Sun, rather than by the momentum of photons. Q: Why do comet tails always point away from the sun instead of trailing behind the comet? Choices: - dust particles attract - dust particles evaporate - dust particles liquify - dust particles recoil A:
(Answer)
dust particles recoil
Ques: Answer the following question given this paragraph: Bacteria known as decomposers break down wastes and dead organisms into smaller molecules. These bacteria use the organic substrates they break down to get their energy, carbon, and nutrients they need for survival. Q: What organisms known as decomposers break down wastes and dead organisms into smaller molecules? Choices: - consumers - trees - herbivores - bacteria A:
Ans: bacteria
(Q).
Answer the following question given this paragraph: Pressure shows how concentrated the force is on a given area. The smaller the area to which force is applied, the greater the pressure is. Think about pressing a pushpin, like the one in Figure below , into a bulletin board. You apply force with your thumb to the broad head of the pushpin. However, the force that the pushpin applies to the bulletin board acts only over the tiny point of the pin. This is a much smaller area, so the pressure the point applies to the bulletin board is much greater than the pressure you apply with you thumb. As a result, the pin penetrates the bulletin board with ease. Q: What is the effect on pressure when the area of applied force is very concentrated? Choices: - direction increases - pressure disperses - pressure reduces - pressure increases A:
(A).
pressure increases
Ques:Answer the following question given this paragraph: The speed of light is different in different media. Q: Different media affect what property of light? Choices: - density - color - temperature - speed A:

Ans:speed
Question: Answer the following question given this paragraph: Similarly, monoprotic bases are bases that will accept a single proton. Diprotic acids contain two ionizable hydrogen atoms per molecule; ionization of such acids occurs in two steps. The first ionization always takes place to a greater extent than the second ionization. For example, sulfuric acid, a strong acid, ionizes as follows: K a1 = more than 10 2 ; complete dissociation. Q: What is the basic characteristic of monoprotic bases? Choices: - accepts one neutron - accepts no neutrons - accepts no protons - accepts one proton A:
Answer:
accepts one proton