Answer:
A.
Explanation:
because it studies the key word Astro which means astrophysics which is stars good luck
Count the ones expressing the trait in the F2 gen. Divide by how many animals there are in F2. Times by 100.
The alula is a small structure that is found on birds. It is located at the joint between the hand wing and the arm wings of birds and it is the freely moving, first digit of a bird's wing. It is normally used by birds in slow flight. In humans, the structure that is comparable to the alula is the thumb.
If a star is located 100 light years from earth the light will tack 100 years to reach earth I hope I helped you and good luck