The double membrane. It's theorized that chloroplasts used to be their own single-celled organism in the environment (and therefore with its own membrane). Then, the theory states, a larger cell took in the chloroplast by endocytosis, which involves surrounding the chloroplast in the large cell's own membrane. The chloroplast would then have two membranes surrounding it. This is similar to the thinking for mitochondria becoming an organelle as well. Hope this helps! :)
Answer:
Darwin delayed publication of the Origin of Species for two decades, until 1859, because he was nervous about the likely reaction of church authorities and professional colleagues to the theory of evolution by natural selection (a theory he first developed in 1839).
Explanation:
It is imperative to use aseptic techniques whe handling microbial cultures because aseptic techniques:
1. reduce contamination of your cultures from enviornment
2. reduce contamination/transfer of bacteria between different culture smears
3. helps to isolate a single microorganism to get a culture smear of
Answer:
50 percent
Explanation:
O is a recessive trait. The father has a B and an O, using a punnet square you are able to determine that the possible outcomes are BO, BO, OO, and OO
Answer: Meditation
Explanation: Meditation is an exercise where a person uses a method such as intentionally bringing one's awareness to encounters happening in the very period with no judgment or concentrating the psyche on a specific matter, reasoning or training. This is done to teach the mind the skill of the mental action of deeming or taking notice of somebody or something, and perception of reality or circumstance thereby attaining a mentally clear, emotionally quiet and firmly established condition.
