Answer:
Oxygen in the atmosphere is a molecule because it contains molecular bonds. It is an element because it is made from atoms of only one element - oxygen.
Explanation:
The diaphragm,
During inhalation, the diaphragm is contracted which increases the volume of the lung cavity. During exhalation, the diaphragm is relaxed which decreases the volume of the lung cavity
The answer is D.
"An irregular galaxy is a galaxy that does not have a distinct regular shape, unlike a spiral or an elliptical galaxy. Irregular galaxies do not fall into any of the regular classes of the Hubble sequence, and they are often chaotic in appearance, with neither a nuclear bulge nor any trace of spiral arm structure."
Answer:
The correct option no is 2. To determine if they are prokaryotic or Eukaryota she should look for the <u>nucleus.</u>
Explanation:
Prokaryotes can be described as organisms that are single-celled and lack membrane-bound organelles. Eukaryotes can be described as multicellular organisms and they possess membrane-bound organelles.
In Eukaryotes, the hereditary material is present inside a membrane-bound organelle termed as the nucleus. The prokaryotes do not have a nucleus and their hereditary material is present in the cytoplasm. Hence, option no 2 is correct.
Other structures like DNA and ribosomes are present both in the prokaryotic and eukaryotic cells.
