In sea urchins, the protein bindin enables sperm to attach to eggs, and is thought to play an important role in successful fertilization in the ocean. Bindin genes differ substantially among sea urchin species. The bindin gene is therefore likely to play a major role in: a. Geographic separation
b. Prezygotic isolation
c. Postzygotic isolation
d. Gametic isolation
e. Both B & D

Which conditions need to be in balance for cells to function? check all that apply. blood sugar food intake body water body temperature body mass

Which part of the neuron below is indicated by the arrow, and what is its function? hormones send chemical signals throughout the body to regulate other body processes. hormones are chemical signals that are sent throughout the body to regulate other body processes. hormones send electrical signals throughout the body to regulate other body processes. hormones are electrical signals that are sent throughout the body to regulate other body processes.

Me brainliest 1. what does a red shift mean? blue shift? 2. describe the big bang theory. according to this theory, how old is the universe? 3. scientists believe the universe is expanding. what is the evidence that supports this? 4. describe a nebula.5. describe the 3 types of galaxies. what is a barred spiral galaxy? 6. what is a light year? how far is alpha centauri from earth? 7. describe the universal law of gravitation. be sure to include gravitational force between two objects.8. describe the planets’ orbits around the sun.9. what is the asteroid belt? where is it located? 10. describe rotation and revolution of earth. what determines an earth day and year? 11. how do galaxies exist? 12. compare and contrast the inner and outer planets.13. what causes the seasons?