Sponges, medusa and polyp, gymnosperm
The answer is B.
Veins are blood vessels that carry the blood towards the heart. The Vessels that carry the blood way from the heart is called artery
Answer: genetic mutation maybe?
Explanation: i know that it is a genetic mutation and that it is passed from mothers to children, not from the father. the queen held the trait in her DNA and all the male children had it but the queen never showed any signs of having hemophilia
Crossing over? That involves the random exchange of chromosomes.
1. Testing only one variable
A controlled variable means its the one that stays the same. In a controlled experiment, it means there is only one manipulated, (changed) variable.
