The circulatory system is responsible for moving blood cells throughout the body.
        
             
        
        
        
Answer:
The correct answer is - the cell membrane.
Explanation:
When a human cell gets an external stimulus it triggers the production of the specific compound or chemical release which is packed in vesicles from the endoplasmic reticulum and Golgi apparatus to the cell membrane. The cell membrane is the cell organelle that allows or prohibits the entry or exit of any substance.
Chemical release or secretion also depends on the cell membrane and it allows the secretion of chemicals and plays an important role in the secretion of chemical, hormones, or any substance.
 
        
             
        
        
        
A monocot<span> seed has an embryo with a single cotyledon, and a </span>dicot<span> seed has an embryo with two cotyledons. </span>Monocots<span> have stem vascular systems with their bundles scattered, and </span>dicots<span> have their stem vascular systems with their bundles in a ring.</span>
        
             
        
        
        
Answer:
The correct answer would be - D. the distribution of alleles in a population.
Explanation:
Allele frequency in population genetics is the term used to provide the amount of the different alleles in particular loci. In other words, it is the distribution of alleles in a population.
The term allele frequency refers to the fraction of the copies of the gene of the alleles in a known population. It can be calculated by the number of allele present of interest divided by total number of alleles in a population.