Answer: Option A
Explanation:
Mendel used many the same pea plants for the description of many characters independently in those pea plants only.
The Principal of Independent Assortment states how different genes express themselves independently when reproductive cells develop.
This was first observed by Mendel by his experiments. Every character of the pea plants that he used appeared independently.None of the two characters got mixed with one another.
Hence, the correct answer is option A
Answer:
an incident ray
Explanation:
An incident ray is a ray of light that strikes a surface.
Answer:
Pictures from Hubble help scientists learn more about the whole universe.
Explanation:
Hubble has helped scientists learn about our solar system. The telescope observes comets and planets. Hubble even discovered moons around Pluto that had not been seen before. The telescope has helped scientists understand how planets and galaxies form. Galaxies contain billions of stars. A picture called "Hubble Ultra Deep Field" shows some of the farthest galaxies ever seen. Because of Hubble pictures, scientists think the universe is almost 14 billion years old.
Answer:
The respiratory system of birds is arguably the most effective respiratory system of all air-breathers
the respiratory system of birds is arguably the most effective respiratory system of all air-breathers. Upon inhalation, air first flows into posterior air sacs, then into the lungs, and then into anterior air sacs on the way to being exhaled. Thus, there is one-way flow of air through the lungs, along thousands of tubules called parabronchi.
Explanation: