Answer : d) parasite
A parasite is an organism that attaches itself to a host (another organism) and while the parasite benefits, the host is being harmed gradually. This is a symbiotic relationship where only one benefits and the other is hurt.
Fossils form in sedimentary rocks such as limestone, shale and sandstone.
Answer:
Before the antibiotic, the ‘good’ bacteria had colonized her intestines and formed colonies that made up her biome. These colonies out-compete other bacteria, including ‘bad’ bacteria that tried to grow in the intestines hence protecting her intestines from infection.
However, the antibiotics wiped out the established colonies of ‘good’ bacteria –destroying her biome- and gave room for recolonization of the intestines by bacteria. The secondary succession gave a chance for the ‘bad’ bacteria to also thrive and cause her massive infections.
Are there options? Structure meaning skeleton or anatomy?
Atomic number, the number of a chemical element in the periodic system, whereby the elements are arranged in order of increasing number of protons in the nucleus. Accordingly, the number of protons, which is always equal to the number of electrons in the neutral atom, is also the atomic number.
