Answer:
Formaldehyde is a highly reactive molecule that can be directly irritating to tissues with which it comes into contact. Human and animal studies indicate that formaldehyde, at certain exposure levels, can be irritating to the upper respiratory tract and eyes with inhalation exposure, to the skin with dermal exposure, and to the gastrointestinal tract with oral exposure. Formaldehyde-induced noncancer and cancer effects appear to occur only at portals-of-entry (i.e., upper respiratory tract, gastrointestinal tract, and skin).
Answer: it's unclear why marsupials thrived in Australia. however one plan is that once times were powerful, marsupial mothers might jettison any developing babies they'd in their pouches, whereas mammals had to attend till gestation was over, defrayment precious resources on their young, Beck said.
Explanation:
The Romanus Pontifex (1454) included papal decree for the opening up of southern Africa, led to the enslavement of non-Christian natives of Africa and the New World and gave Portugal a trade monopoly over areas of Africa and Asia. The Romanus Pontifex granted control over any newly discovered lands to Portugal.
the answer is B
D or A is the answer. I least I narrowed it down.
I'm sorry if I'm wrong
A C D
