Answer:
The main difference between exotic and invasive species is that exotic species is harmless to the ecosystem whereas invasive species is harmful to the ecosystem.
Explanation:
Invasive species can be harmful the native habitats, natural areas such as lakes, forests, and rivers, agriculture, economy, and humans.
Answer:
The placement of fossils throughout the surface layers of Earth made the geologists decide where one division of the geologic time scale ends and the next begins.
Explanation:
Fossils play a major role in identifying or deciding the geologic time scale eras or eons. Fossils are the only evidence in the form of specimen remains like bones, leaves, shells, teeth, or burrows, tracks etc all of which provide information about life on Earth during a particular time.
Fossil placement on earth’s surface creates fossil records. On the earth’s surface like rocks, a younger fossil will be buried on a layer above the older fossil layer. Each layer will represent a unique life form that existed during a time period and determines the division of geologic time scale.
In fact each of the eras like Paleozoic, Mesozoic, or Cenozoic ends with the suffix zoic since the time change of these eras is based on the evolution of animal life during that period
.
Answer:
A molecule of the kind normally found in living systems. Organic molecules are usually composed of carbon atoms in rings or long chains, to which are attached other atoms of such elements as hydrogen, oxygen, and nitrogen.
Explanation:
Explanation:
Receptors = Sensory neurons
Relay = Relay neurons
Effectors = Motor neurons
Cell bodies of sensory neurons are only found in the root ganglion. (F)
Cell bodies of relay neurons are only found is the grey matter of the spinal cord. (G)
Cell bodies of motor neurons are also found at G.
Hence the answer is Option D.