The following population is comprised of 1,000 individuals. 400 individuals are juveniles (not yet reproducing), 500 are of reproductive age, while 100 are too old to reproduce. the sex ratio is 50: 50 males to females. what is the effective population size?
a. 500
b. 1000
c. 400
d. 100

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.

In the water cycle , when does water undergo a chemical change

Ture or false evidence for evolution includes millions of fossils