Answer the following question given this paragraph: Most scientists who study dark matter think it is a combination. Ordinary matter is part of it. That is mixed with some kind of matter that we haven't discovered yet. Most scientists think that ordinary matter is less than half of the total matter in the Universe. Q: Most scientists think that ordinary matter makes up how much of the total matter in the universe? Choices: - greater than half - about half - more than half - less than half A:
less than half
(Question)
Answer the following question given this paragraph: If all three bulbs are set a full intensity, the person sees __________. Q: Chewing insects such as dragonflies and grasshoppers have how many sets of jaws? Choices: - one - four - three - two A:
(Answer)
two
Ques: Answer the following question given this paragraph: Together with random fertilization, more possibilities for genetic variation exist between any two people than the number of individuals alive today. Sexual reproduction is the random fertilization of a gamete from the female using a gamete from the male. In humans, over 8 million (2 23 ) chromosome combinations exist in the production of gametes in both the male and female. Essentially, when the homologous pairs of chromosomes line up during metaphase I and then are separated at anaphase I, there are (2 23 ) possible combinations of maternal and paternal chromosomes. During random fertilization, a sperm cell, with over 8 million possible chromosome combinations, fertilizes an egg cell, which also has over 8 million possible chromosome combinations. Together, there are over 64 trillion unique combinations, not counting the additional variation produced by crossing-over during prophase I. In other words, each human couple could produce a child with over 64 trillion unique chromosome combinations!. Q: What type of cell does the sperm cell fertilize? Choices: - fat - bacteria - protein - egg A:
Ans: egg
(Q).
Answer the following question given this paragraph: Why is animal communication important? Without it, animals would not be able to live together in groups. Animals that live in groups with other members of their species are called social animals . Social animals include many species of insects, birds, and mammals. Specific examples of social animals are ants, bees, crows, wolves, lions, and humans. To live together with one another, these animals must be able to share information. Q: Animals that live in groups with other members of their species are called what? Choices: - present animals - common animals - energetic animals - social animals A:
(A).
social animals
Ques:Answer the following question given this paragraph: Flagella ( flagellum , singular) are long, thin structures that protrude from the cell membrane. Both eukaryotic and prokaryotic cells can have flagella. Flagella help single-celled organisms move or swim towards food. The flagella of eukaryotic cells are normally used for movement too, such as in the movement of sperm cells, which have only a single flagellum. The flagella of either group are very different from each other. Prokaryotic flagella, shown in Figure below , are spiral-shaped and stiff. They spin around in a fixed base much like a screw does, which moves the cell in a tumbling fashion. Eukaryotic flagella are made of microtubules that bend and flex like a whip. Q: What are the long, thin structures that protrude from the cell membrane and help single-celled organisms move or swim towards food? Choices: - microvilli - tentacles - sporangia - flagella A:

Ans:flagella
Answer the following question given this paragraph: Earth and Moon orbit each other. This Earth-Moon system orbits the Sun in a regular path ( Figure below ). Gravity is the force of attraction between all objects. Gravity keeps the Earth and Moon in their orbits. Earth's gravity pulls the Moon toward Earth's center. Without gravity, the Moon would continue moving in a straight line off into space. Q: What keeps the earth orbiting the sun? Choices: - strong nuclear force - magnetic force - weak nuclear force - gravity A:
gravity