Which of the following is NOT a reason that humans chose selective breeding instead of genetic engineering for most of human history?
We did not know enough about DNA.
The technology did not exist until recently.
Selective breeding works even though it is a slow process.
a
Genetic engineering is less precise than selective breeding.

Answer ! in your opinion, what are the limiting factors that might affect the growth or diversity of our ecosystem? respond to this question in claim, evidence, reasoning format. 1. make your claim (i are the limiting factors that might affect the growth or diversity of our 2. follow the claim with 3 pieces of evidence. evidence may be taken from the reading, the videos, previous lessons, or googled answers. site sources, too. 3. use reasoning to explain why you chose your evidence.

Which statement describes characteristics of planarians? a they live in oceans, are parasites, and reproduce only sexually. b they live in fresh water, are parasites, and reproduce only asexually. c they live in oceans, are free living, and reproduce sexually and asexually. d they live in fresh water, are free living, and reproduce sexually and asexually.

Natural selection changes allele frequencies because some survive and reproduce more successfully than others.