Why can't penguins fly?

Which of the following conclusions can be accurately drawn by analyzing both the Silk Road trade and the African gold-salt trade?A. In both cases, wealthy Asian and European traders were able to exploit African merchants. As a result, African countries suffered from trade.

B. In both cases, Islam spread among societies that traded with one another. This contributed to Islam becoming the dominant religion in Africa and Asia.

C. In both cases, socieites were brough into contact through trade. The cultural exchanges that went along with that trade enriched those societies.

D. In both cases, interactions between societies led to conflict despite the success of trade contacts. These clashes left trading societies vulnerable.

How are frog bones similar to trees?

Gene is investigating what makes bread moldy. He put two identical slices of bread on separate plates. He made one slice moist and kept the other slice dry. He left the uncovered plates on a table for 2 hours. Then, he sealed them in plastic bags and put them in a dark, warm place. He looked at them each day for five days. After five days, he observed that 50 percent of the moist slice was moldy, and none of the dry slice was moldy. If Gene observed the slices for three more days, what would he most likely observe?

The longest interval of time is called

A zebra cell is just about to replicate its DNA. Which of the following will happen first?A. The DNA unravels to make two strands.
B. All of the cell's DNA attaches to proteins.
C. RNA attaches to DNA
D. The DNA folds over on itself to create a dense chromosome.

Temperate deciduous trees lose their leaves in Fall. Explain why trees in temperate rainforest and tropical rainforest don’t lose their leaves. PLS HELP ME!!!!!! O_O