Answer:
Larger ships transport invasive species in their ballast water, while fouling organisms such as barnacles, seaweeds and mussels can move from one location to another by hitching, a ride on a boat, on items you use in the water and even your clothes
The answer is meiosis.
In meiosis, this process produces 4 daughter cells which are all genetically different to each other and their parent cell. They have only half of the chromosomes. This is because, at one point in the process before the cells divide, parent do not copy their genetic information, which ends up each daughter cells only receiving half of the chromosomes after division.
The daughter cells are also said to be haploid, and in human, these cells are usually gametes, which are for reproduction, so that after 2 of these haploid cells join together, the correct amount of chromosomes can be restored.
Adaptions are basically add-ons and/or updates while variations are like different types.
I believe that classical conditioning is a type of learning in which a neutral stimulus comes to elicit a response after being paired with a stimulus that would elicit the same response naturally. It is where a conditioned stimulus becomes associated with an unrelated unconditioned stimulus in order to produce a behavioral response which is referred to as a conditioned response.
