Answer the following question given this paragraph: Plants may have colonized the land as early as 700 million years ago. The oldest fossils of land plants date back about 470 million years. The first land plants probably resembled modern plants called liverworts , like the one shown in Figure below . Q: The oldest fossil of land plants date back how many millions of years? Choices: - 520 million years - 350 million years - 430 million years - 470 million years A:
470 million years
(Question)
Answer the following question given this paragraph: The most common type of mirage is an illusion that light from faraway objects is reflected by a pool of water that is not really there. Mirages are generally observed in deserts, when there is a hot layer of air near the ground. Given that the refractive index of air is lower for air at higher temperatures, explain how mirages can be formed. Q: What term is used to describe an illusion that light from faraway objects is reflected by a pool of water that is not really there? Choices: - version - prototype - Mirror - mirage A:
(Answer)
mirage
Ques: Answer the following question given this paragraph: Figure 9.3 This car is in dynamic equilibrium because it is moving at constant velocity. There are horizontal and vertical forces, but the net external force in any direction is zero. The applied force F app between the tires and the road is balanced by air friction, and the weight of the car is supported by the normal forces, here shown to be equal for all four tires. Q: When is a moving car said to be in dynamic equilibrium? Choices: - at rest - at homeostasis - when accelerating - zero net force A:
Ans: zero net force
(Q).
Answer the following question given this paragraph: Diffusion can occur across a semipermeable membrane, such as the cell membrane, as long as a concentration gradient exists. Molecules will continue to flow in this manner until equilibrium is reached. At equilibrium, there is no longer an area of high concentration or low concentration, and molecules flow equally in both directions across the semipermeable membrane. At equilibrium, equal amounts of a molecule are entering and leaving a cell. Q: Diffusion can occur across a semipermeable membrane, such as the cell membrane, as long as a what exists? Choices: - polarity - parity - differential - concentration gradient A:
(A).
concentration gradient
Ques:Answer the following question given this paragraph: Q: What is the process by which plants make their own food? Choices: - glycolysis - metabolism - cellular respiration - photosynthesis A:

Ans:photosynthesis
Ques: Answer the following question given this paragraph: E XA MP L E 1 1. The most common carbon atoms have six protons and six neutrons in their nuclei. What are the atomic number and the mass number of these carbon atoms?. Q: The most common carbon atoms have six protons and six neutrons in their what? Choices: - ribosomes - neuron - membrane - nuclei A:
Ans:
nuclei