Ques: Q: Extended stays in zero gravity are not healthy for human beings. thus, for the comfort of the astronauts, the station is rotated so that the astronauts feel there is what? Read this paragraph and choose the correct option from the provided answers: A space station was established far from the gravitational field of Earth. Extended stays in zero gravity are not healthy for human beings. Thus, for the comfort of the astronauts, the station is rotated so that the astronauts feel there is an internal gravity. The rotation speed is such that the apparent acceleration of gravity is . The direction of rotation is counter-clockwise. If the radius of the station is , what is its rotational speed, ?. Choices: - revealed gravity - still gravity - Fixed Gravity - internal gravity A:
Ans: internal gravity

Ques: Q: Herbivores and the bacteria that live in their intestines demonstrate a two-way beneficial relationship called what? Read this paragraph and choose the correct option from the provided answers: An example of a mutualistic relationship is between herbivores (plant-eaters) and the bacteria that live in their intestines. The bacteria get a place to live. Meanwhile, the bacteria help the herbivore digest food. Both species benefit, so this is a mutualistic relationship. The clownfish and the sea anemones also have a mutualistic relationship. The clownfish protects the anemone from anemone-eating fish, and the stinging tentacles of the anemone protect the clownfish from predators ( Figure below ). Another example of this type of symbiotic relationship is the relationship between the plover bird and the African crocodile. The tiny blackbird acts as a toothpick for the fierce crocodile, and helps by removing tiny morsels of food that are stuck between the crocodile's teeth. These food remains are the source of food for the bird. Another example is between the ostrich and the zebra. The ostrich always moves with the herd of zebras since it has a poor sense of hearing and smell, whereas the zebra has very sharp senses. The ostrich has a keen sense of sight, which the zebra lacks. Hence, these two species depend on each other to warn one another of any nearby imposing dangers. Choices: - parasitism - pragmatism - syncretism - mutualism A:
Ans: mutualism

Ques: Q: Algae convert energy from the sun into food by means of what process? Read this paragraph and choose the correct option from the provided answers: Algae is sometimes mocked as a source of fuel. But algae are a potentially wonderful source of power. They convert energy from the Sun into food by photosynthesis. Algae can be grown in desert areas where other crops cannot grow. Nutrients for algae may be wastes from other processes. Algae can be processed to be made into a liquid. There is a lot of research going on to harness algae for biofuels. Choices: - luminosynthesis - compression - glycolysis - photosynthesis A:
Ans: photosynthesis

Ques: Q: Because atoms have equal numbers of positive protons and negative electrons, what kind of electric charge do they possess? Read this paragraph and choose the correct option from the provided answers: Atoms have equal numbers of positive protons and negative electrons, so they are neutral in electric charge. Choices: - none - positive - negative - neutral A:
Ans:
neutral