20. a comet's tail always points away from the sun because
dust; the solar wind pushes the particles away from the comet's head
ion; the solar wind pulls the particles towards the comet's head
dust; the solar wind pulls the particles towards the comet's head
ion; the solar wind pushes the particles away from the comet's head

Which statements describe resources? one of the factors people use when deciding where they will live is the availability of resources. renewable resources have little value for people. resources are unevenly distributed throughout the world. energy is the world resource which has the highest use. the use of nonrenewable resources has decreased in recent history. the use of resources is evenly distributed throughout the world. the world's oil supply will last for the next forty years if its use continues as expected.

Select the correct answer. tay-sachs disease is caused by a mutation in the hexa gene located on chromosome 15. tay-sachs follows an autosomal recessive pattern of inheritance. with the of the diagram, identify which of the offspring will be an unaffected carrier. a diagram showing the genes of parents who are carriers of tay-sachs disease a. a, b, and c b. b and c c. a and d d. a e. d

What factors contribute to the effect an environmental toxin has on the human body?