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Questions in Grade High-school

[Terjawab] Why do the cells in all living things need energy? A. to fuel their chemical reactions B. to help them decompose C. to communicate with other cells D. so they can block sunlight

[Terjawab] What stone-faced animal was all the rage in 1970?

[Terjawab] Jared has 96 books to arrange on 6 shelves of a bookcase. He wants each shelf to have the same number of books. Using the distributive property, write an expression Jared can use to find out how many books he can put on each shelf.

[Terjawab] Which of the following is true about scientific theories? I. New research is often done to learn more about existing scientific theories. II. Scientific theories can be revised, changed, or even rejected. III. Scientific theories are considered to be facts and cannot ever be modified. IV. New scientific theories can be formed to explain new phenomena.

[Terjawab] Which phrase best describes osmosis? A. The process where DNA is created. B. The movement of molecules through the cell membrane. C. The division process of the cell's cytoplasm. D. The movement of water molecules from an area of high concentration to an area of low concentration.

[Terjawab] Which of the following is true of a human karyotype? A. Each cell has 22 pairs of homologous chromosomes. B. Each cell has one pair of sex chromosomes. C. The chromosomes are numbered in order from 1 to 22. D. All of the above are true.

[Terjawab] Can you give examples of carbon in our nonliving environment?

[Terjawab] Jaiden is writing a report about the structure of the atom. In her report, she says that the atom has three main parts and two subatomic particles. Do you agree with her? Why or why not?

[Terjawab] In the lock-and-key model of enzyme action, the _______________ fits into _______ of the enzyme. A. product, substrate B. active site, product C. substrate, active site D. active site, substrate

[Terjawab] A woman treated her home with a pesticide that kills spiders. The first application killed 78% of the spiders. Two months later, she applied the pesticide again, but it only killed 45% of the spiders. What would best explain the decrease in the effectiveness of the pesticide?