Which is a drawback to using incineration to dispose of toxic materials? a. fire is a thermal pollutant b. the smoke that results is toxic c. the ashes that result are toxic d. some toxins will not burn

Plz genetic engineering can be applied to many fields including medicine and agriculture. which of the following is a medical application of genetic engineering? a. giving crop plants recombinant dna so that they would be resistant to herbicides. b. examining a persons pedigree to determine whether they can carry a gene for a genetic disease. c. analyzing a persons dna to see how closely they are related to another person. d. certain genes into bacteria so that they will produce a needed medicine.

Explain how paleontologists use trilobite fossils as index fossils for various geologic time periods.

Which is an example of a vestigial structure? a. tail of a monkey b. fin of a fish c. flower of a plant d. tailbone of a human