What are some reasons that fossils may not form? Choose all that apply. a. No animals or plants fossilized due to lack of titanium
B. There may not have been any living things around when the rock layer formed.
C. The conditions may not have been right at the time for the formation of fossils.
D. There were no rock formations.

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.

cell division is not regulated in tumor cells.

protistas excret ethanol used in the manufacture of vinegar