An indicator species is an organism whose presence, absence or abundance reflects a specific environmental condition. Indicator species can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem.
Teen mothers suffer from depression at higher rates than older mothers do.
Answer:
True.
Explanation:
Bacteria are mainly divided into two groups - gram positive bacteria and gram negative bacteria. This division is based on the presence of the different types of cell membrane and sensitivity against different chemicals.
Cephalosporin is a drug belongs to the β-lactam antibiotics extracted from the fungus Acremonium. This drug is further divided into the different generations and shows different sensitivity towards the gram positive and the gram negative bacteria.
Thus, the answer is true.
The four main types of vegetables include the following: Root vegetables, Greens, Beans and peas, and the last, are other types of vegetables. Based on the given choices above, the four main types of vegetables include Berries, squash, orange and lentils. The correct answer would be the third option. Hope this answer helps.
