Answer:
They release chemical messengers to communicate with cells they may or may not be in direct contact with.
Explanation:
Unicellular organisms such as bacteria or yeast, 'talk' to each other through the release of chemicals. In bacteria, this is known as quorum sensing which allows them to determine the surrounding bacterial population density. In yeast, one of the more popular pathways is known as the mating factor pathway, which allow the organisms to find mates. Whereas, in multicellular organisms (such as humans), this chemical release allows for cell-cell co-ordination which keeps the system functioning correctly.
Answer:
Mass and acceleration will remain constant
B) Embryonic stem cell research requires the use of human embryos. Its an unethical dilemma.
Answer:
Crocodiles and snakes are more alike since they both develop from an egg.
Lizards and snakes are more alike since both species have a recent common ancestor.
Controlling voluntary body movements, processing information from sense organs, thoughts, and learning abilities.
