Answer:
By volume, oxygen is the second most abundant element in the hydrosphere and troposphere. The troposphere is the lowest part of Earth's atmosphere which is nothing but air, and the hydrosphere is made up of the Earth's water which is full of oxygen at any given moment.
Answer:
Animals are born knowing how to do something instinctual, but they must be taught learned behaviors and practice them to get good at them. Male birds of paradise are known for having bright markings that they flash while making complex movements when females are nearby. ... This is an example of courtship behavior.
C. Xylem moves water up, and phloem moves food down
Answer:
d. Solar panels are expensive.
Explanation:
All the other things are not right.
Bacteria.
When bacteria are exposed to antibiotics, the antibiotics kill the bacteria that does not have resistance gene while the bacteria that have the resistance gene survive and produce offspring with the gene creating generations of bacteria with a resistance gene. This demonstrates that through natural selection, bacteria are evolving into antibiotic-resistant bacteria. The selective agent is the antibiotic and the main culprits are the humans.