An animal without a backbone is known as an invertebrate. A vertebrate is n animal that has a spine. And I am pretty sure polyp and hermaphrodite have really nothing to do with the backbone. Hope this helped!
Answer:
This is a transformation from mechanical energy to thermal
Explanation:
which is (heat) energy
Biology > Cell biology > Passive transport
There are different types of transport in the cell that can be classified into two groups: passive transport (which does not require energy) and active transport (which requires energy because it goes against the concentration gradient).
Diffusion is a type of passive transport and it does not require energy, it can be divided into simple diffusion (molecules pass through the membrane without the help of any channel) and facilitated diffusion (molecules pass through the membrane with the help of a protein channel).
Facilitated diffusion will transport certain molecules and simple diffusion others. Larger, polar and charged molecules will need help to cross the membrane, so they will do so by facilitated diffusion. Therefore, the answer is D.
Answer:
1) The human reproductive organ that produces sperms and also secretes hormone is testis.
2) The hormone testosterone is secreted which is responsible for the development of male secondary seksual characters such as body hair, muscles and bone mass.
