Correct answer: D
A pollen is where male gametes are produced and so the number of chromosomes, as we are talking about gametes, is n. This means that the grain of pollen will only have a copy of each gene, and therefore only one allele for each gene - one S, and one T or t. So, the possible combinations are ST and St.
It is c your answer for your questions
Answer:The gases became hotter, and pressure increased
Explanation: This is the exact answer so i would rephrase the way it’s stated.
Answer:
"Aerial roots preserve water in the orchid. Aerial roots allow the orchid to attach itself to trees."
Answer:
Mitochondria and chloroplasts
Explanation:
Mitochondria and chloroplasts each have their own DNA due to at one point being prokaryotes that fused with other prokaryotes.