Answer:
b. It allows gas exchange while preventing water loss
Explanation:
Amniotic eggs are the feature of land animals such as reptiles, birds, mammals, etc. The amniotic eggs have four extra-embryonic membranes. This semipermeable protective shell allows the exchange of respiratory gases but does not support the transport of water out of the egg.
The ability to maintain the water inside the egg while permitting gaseous exchange is the specific feature of amniotic eggs and allowed diversification of land animals in the land habitats.
The scientist who is said to have discovered all the four nitrogenous bases present in the DNA of all organisms is, Erwin Chargaff, an Austro-Hungarian biochemist who immigrated to the United States. Hope this helps!
Question 1: All of the above
Question 2: Has mass and takes up space
Question 3: True
Question 4: A<span> definite volume but no definite shape.
Question 5: Liquid
Question 6: A</span><span> substance with a high conductivity that easily transfers heat
Question 7: Liquid to solid </span>
A. It has organelles enclosed in membranes
Geological change will not cause a mass extinction, because it happens on a too big scale - on the scale of millions of years. During such long time, it is more likely that other causes will influence the survival of extinction of species, such as climate change or environmental disasters, and even if there is a small influence, it would not be significant next to other causes.
