Answer:
The introns of protein-encoding nuclear genes of higher eukaryotes almost invariably begin (5') with GT and end (3') with AG. In addition, the 3'subterminal A in the “TACTAAC box” is completely conserved; this A is involved in bond formation during intron excision.
So here are the answers that will complete the given statements above.
11. All of the planets in the solar system have MOONS or NATURAL SATELLITES <span>with the exception of Mercury and Venus.
12. </span>Because there is no ATMOSPHERE <span>on the moon, any liquid water would have evaporated into space long ago.
13. </span><span>The length of a planet’s day is determined by its SPEED OF ROTATION.
14. </span><span>The large, irregular objects mostly located between Mars and Jupiter are ASTEROIDS. Or in general term, it is known as the asteroid belt.
15. </span><span>Icy objects that mostly travel in long, elliptical orbits around the sun are COMETS.
Hope these answers help.</span>
The possible cause for a decrease in ecosystem productivity is : B. a decrease of the biodiversity o an ecosystem
Decrease in biodiversity means that there will be less organisms that support each other to maintain the balance in the ecosystem, which eventually decrease its productivity
