To prevent blood flowing back after each heartbeat. They ensure that the blood flows only in one direction (back to the heart).
Answer: alleles
Explanation:
"An allele is a variant form of a gene. Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism."- Nature .com
<span>A flashlight is to battery as your body is to: FOOD.</span>
Capsule is a structure present in prokaryotes but absent in eukaryotes.
<h3>What are prokaryotes? </h3>
Prokaryotes cells are cells that do not have structures bounded in a membrane. example include bacteria.
<h3>What are Eukaryotes?</h3>
Eukaryotes cells are organisms that have their nucleus and other organelles bounded in an enclosed membrane.
Prokayote e.g Some bacteria have capsules it is carbohydrates in nature and it enables the bacteria to attach themselves to the surface. This is not present in eukaryote cells.
Conclusively, Capsule is the structure present in prokaryotes but absent in eukaryotes.
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