Fungi exhibit certain characteristics. one of these characteristics is that they

Fungi exhibit certain characteristics, one of which is that they are achlorophyllous, that is they do not have chlorophyll , which is necessary for photosynthesis. Thus due to this, fungi cannot  perform photosynthesis and therefore cannot make their own food but rely on readymade food matter.

They mostly feed on dead organic matter  the process of absorption. Some fungi release enzymes that help break down dead organics matter into chemicals that the fungi can absorb as food. Other fungi obtain food directly from living beings, which means they are parasitic.

answer: the blood-brain barrier is a layer of specialized membranes and cell processes designed to keep undesirable substances from passing from the bloodstream into the precious tissues of the brain. while the blood-brain barrier does keep most bad things out of the central nervous system, it is not impermeable.

explanation:

sex cells are usually half's then they find another half and make a fertilize egg