The option B is correct..
Oxygen-16 and Carbon-12 are stableisotopes of elements O and C respectively. Hence, they do not have half-lives. But Carbon-14 andUranium-238 are radioactive isotopes. Among them Carbon-14 has relatively short half-life as about 5730 years while Uranium-238 has a long half-life as about 4.5 billion years.
Answer is. uranium-238
C- mushroom
Mushrooms break down (decompose) dead cells of animals and plants.
Algae, lichen, and oak trees go through photosynthesis and are producers.
The system that controls and coordinates
the body through hormones is the <span>endocrine system.</span>
<span>Endocrine system produces hormones and then these hormones
transmit the messages to various cells within the body. Hormones have great
importance in our body system and even our body is functioning due to hormones.
If hormones are disturbed it can lead to
many diseases.</span>
Passive transport is a movement ofbiochemicals and other atomic or molecularsubstances across cell membranes without need of energy input. Unlike active transport, it does not require an input of cellular energy because it is instead driven by the tendency of the system to grow in entropy. The rate of passive transport depends on thepermeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids andproteins. The four main kinds of passive transport are simple diffusion, facilitated diffusion, filtration and osmosis.
