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! :)
The beginnings of a brain first become apparent around four weeks after conception when the neural plate folds to form the neural tube
Learning that occurs
when an organism makes a connection between two events is called "Associative
learning".<span>
The process involves associating various details or events to
learn a particular fact or information. For example one cannot imagine one eye
of his/her father, whenever he/she will imagine the whole face of their father
will make sense to mind and not single eye.</span>
Answer: So I did a graph showing the population growth over the years. I know the setup is different on plato so I know it won't look exactly like this if you draw it on plato.
Explanation:
Answer: Option A) sensory somatic nervous system-controls skeletal muscles
Explanation:
The somatic nervous system (SNS) is controlled by the brain, and direct conscious or voluntary actions by stimulating the skeletal muscles.
For instance: On seeing an oncoming vehicle, a cyclist will swerve to a safe path. This is a voluntary action, where the skeletal muscles are stimulated by the somatic nervous system to avoid hitting the oncoming vehicle.
