Answer the following question given this paragraph: Plants alternate between diploid-cell plants and haploid-cell plants. This is called alternation of generations , because the plant type alternates from generation to generation. In alternation of generations, the plant alternates between a sporophyte that has diploid cells and a gametophyte that has haploid cells. Q: When plant type alternates from generation to generation what is this called? Choices: - turbidity of generation - differentiation of generation - change in generation - alternation of generation A:
alternation of generation
(Question)
Answer the following question given this paragraph: Supination and Pronation Supination and pronation are movements of the forearm. In the anatomical position, the upper limb is held next to the body with the palm facing forward. This is the supinated position of the forearm. In this position, the radius and ulna are parallel to each other. When the palm of the hand faces backward, the forearm is in the pronated position, and the radius and ulna form an X-shape. Supination and pronation are the movements of the forearm that go between these two positions. Pronation is the motion that moves the forearm from the supinated (anatomical) position to the pronated (palm backward) position. This motion is produced by rotation of the radius at the proximal radioulnar joint, accompanied by movement of the radius at the distal radioulnar joint. The proximal radioulnar joint is a pivot joint that allows for rotation of the head of the radius. Because of the slight curvature of the shaft of the radius, this rotation causes the distal end of the radius to cross over the distal ulna at. Q: What is the motion that moves the forearm from the supinated position to the pronated position? Choices: - extension - flexion - supination - pronation A:
(Answer)
pronation
Ques: Answer the following question given this paragraph: When a new air mass moves over a region it brings its characteristics to the region. This may change the area's temperature and humidity. Moving air masses cause the weather to change when they contact different conditions. For example, a warm air mass moving over cold ground may cause an inversion. Q: An inversion may result when what kind of mass moves over cold ground? Choices: - warm water - cold water - cold air - warm air A:
Ans: warm air
(Q).
Answer the following question given this paragraph: Sympatric speciation While the logic and mechanisms of allopatric speciation are relatively easy to grasp (we hope), there is a second type of speciation, known as sympatric speciation, which was originally more controversial. It occurs when a single population of organisms splits into two reproductively isolated communities within the same physical region. How could this possibly occur? What stop (or inhibits) the distinct sub-populations from inbreeding and reversing the effects of selection and nascent speciation? Recently a number of plausible mechanisms have been identified. One involves host selection.143 In host selection, animals (such as insects) that feed off specific hosts may find themselves reproducing in distinct zones associated with their hosts. For example, organisms that prefer blueberries will mate in a different place, time of day, or time of year than those that prefer raspberries. There are blueberry- and raspberry-specific niches. Through a process of disruptive selection (see above), organisms that live primarily on a particular plant (or part of a plant) can be subject to different selective pressures, and reproductive isolation will enable the populations to more rapidly adapt. Mutations that reinforce an initial, perhaps weak, mating preference can lead reproductive isolation - this is a simple form of sexual selection (which we will discuss soon).144 One population has become two distinct, reproductively independent populations, one species has become two. Q: Sympatric type of what occurs when a single population of organisms splits into two reproductively isolated communities within the same physical region? Choices: - biodiversity - extraction - accumulation - speciation A:
(A).
speciation
Ques:Answer the following question given this paragraph: Lizards and snakes belong to the largest order of reptiles, Squamata. Lizards are a large group of reptiles, with nearly 5,000 species, living on every continent except Antarctica. Some places are just too cold for lizards. Q: Squamata is the largest order of what broad animal group, and includes lizards and snakes? Choices: - amphibians - spiny fishes - mammals - reptiles A:

Ans:reptiles
Answer the following question given this paragraph: The light reactions occur in the first stage of photosynthesis. This stage takes place in the thylakoid membranes of the chloroplast. In the light reactions, energy from sunlight is absorbed by chlorophyll. This energy is temporarily transferred to two molecules: ATP and NADPH. These molecules are used to store the energy for the second stage of photosynthesis. The light reactions use water and produce oxygen. Q: Light reactions occur during which stage of photosynthesis? Choices: - intermediate stage - third stage - final stage - first stage A:
first stage