Tides and rain water are constantly changing the amount of

Efficiency is the percent of work put into a machine by the user (input work) that becomes work done by the machine (output work)

Hummingbirds drink nectar from flowers, while robins eat plant seeds. what does this reduce?

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.