Which of these would not be a valid scientific theory?
a)all cells come from pre-existing cel...
Biology, 31.01.2020 12:48, geckos7992
Which of these would not be a valid scientific theory?
a)all cells come from pre-existing cells.
b) humans originated on earth from outer space.
c) the universe is expanding at a constant rate.
d) at one time, all of earth's continents were one large land mass.
Answers: 2
Biology, 22.06.2019 01:00, justhereforanswers13
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.
Answers: 1
Biology, 23.06.2019 02:00, ximena68
Acid rain throughout the northeast united states has lowered the ph of many ponds and lakes. the lowered ph will eventually result in the death of many aquatic animals. compare the map of the u. s. with the ph tolerance range for the organisms listed. based on the tolerances seen here, which aquatic organisms are least likely to survive in the northeastern states?
Answers: 1
Mathematics, 01.07.2019 02:30
Mathematics, 01.07.2019 02:30