An ecosystem is made of? biotic factors, abiotic factors, both biotic and abiotic factors.

Explain why in any given geographical region, women tend to have lighter skins( by 3-4% on average) than men?

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.

The fluid mosaic model of the membrane proposed that membranes