Which of the following describes a relationship of predator-prey a. oxpecker birds eat parasitic ticks off the backs of zebras b. a tapeworm latches itself in the intestines of a rat, feeding off all the nutrients eaten by the rat c. a polar bear catches a seal for dinner d. birds feed off the insects that are stirred up from the grasses as cattle move through

What type of cell is produced after fertilization occurs and the gametes combines ?

1) what three conditions must be present for minerals to form through natural processes? 2) why are minerals considered inorganic substances? 3) how do oxides differ from other minerals that contain oxygen atoms? 4) how is a sulfide different from a sulfate? what makes native elements unique?

(select all the correct choose each statement that is scientific. - the opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on earth. - the universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago. - ocean tides are caused by the uneven gravitational pulls of the moon and sun on different parts of earth. - human life is more valuable than other forms of life on earth because humans are more intelligent than other organisms.