Answer:
True, planets are round because of gravity
Ans.
Steroids are defined as active organic bio-molecules, having four rings with a specific molecular configuration. Steroids play role in two major functions: as hormones or signaling molecules and as structural components of plasma membrane.
Examples of steroid hormones are estrogen, progesterone, and cortisol. Thus, the correct answer is 'option b). they serve as chemical messengers.'
Answer:
Even though they are the same temperature, the metal will feel colder than the wood because of the thermal conductivity of the metal, compared to the wood. Metal is a good conductor of heat, hence it sends away the heat. On the other hand, wood is a poor conductor of heat, hence releases the heat too slowly.
Objects stop emitting radiation only at 0 K, but objects may not reach 0 K, ever. Thus, no object would ever stop emitting radiation.
The study of distribution of living organism is kow as demography, while studying their fosils is known as paleantology.
