CAN SOMEONE PLEASE HELP I REALLY NEED THIS I'M BEING TIMED ITS JUST 3 QUESTIONS THAT I NEED HELP WITH

Study the diagram of a desert food chain . what would most likely happen if the kangaroo rats were killed off and removed from the food chain ?

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.

Number and variety of living organisms includes genetic, species, and ecological types