Explanation:
Each kidney consists of an outer renal cortex, an inner renal medulla, and a renal pelvis.
Answer:
Most pre-mRNA molecules have sections that are removed from the molecule, called introns, and sections that are linked or together to make the final mRNA, called exons.
a cell is the smallest structural and functional unit of an organism
Answer:
It is B
Explanation:
I had this on my test last week
Answer: A.) The nitrogen cycle recycles nitrogen through an ecosystem, making it available to all organisms.
Explanation: Nitrogen is an essential nutrient for plants and a significant component of proteins, which all animals need to grow, reproduce and survive. The nitrogen cycle converts nitrogen into compounds that plants and animals can use.
