The answer to your question is D
Answer:
She is using Karyotyping
Explanation:
A karyotype is the number and visual appearance of the chromosomes in the cell nuclei of an organism or species.
Answer:
Its D, The cell membrane(also known a the plasma membrane) has a job in which it has to allow passage in and out of the cell. Therefore it can prevent harmful substances from entering the cell. Think of it as security, either allowing you access or denying you depending on if you're a threat
(B) different constellations appearing at different times of the year
