Answer:
A) It depends on the dispersal abilities of the organism. If the organism cannot move across the open ocean, it is very likely that the groupʹs ancestors were present on the original land mass before it broke up.
Explanation:
A) It depends on the dispersal abilities of the organism. If the organism cannot move across the open ocean, it is very likely that the groupʹs ancestors were present on the original land mass before it broke up.
B) The groupʹs ancestors cannot have been present on the original land mass before it broke up.
C) The groupʹs ancestors were definitely present on the original land mass before it broke up.
D) The groupʹs ancestors must have independently colonized each of the land masses from a third location within the past 45 million years.
The two land masses are separated by deep ocean channel which are purported to have been moving apart since 45 million years ago. Hence, for the organisms to have a widespread population on both land masses, either of two things are possible:
- The ancestors of the organisms had a wide range of dispersal mechanism to cover the two land masses as they were moving apart or
- The ancestors were present on the original land mass before it broke up into two. When it broke up, each land mass has some parts of the ancestors.
The correct option is A.
An enzyme is protein and it needs to maintain its 3D structure as the enzyme work like "lock and key". A little deformation to the enzyme structure can disable its functions.
Protein is prone to denaturation. Condition like pH and temperature can affect the protein and cause an alteration to its structure. Higher temperature should speed up the reaction but too high temperature might damage the enzyme. So, the "optimal" condition would be the condition where the enzyme structure is not altered.
My best answer would be E<span>ukaryotic</span>