Answer;
A. Blood
Explanation;
The main organs of the Circulatory system are the heart, the brain, the lungs. There are other key things like arteries, veins, and capillaries but they are not organs.
The major tissues in the circulatory system are the epithelial, muscle, nervous, and connective tissues.
Blood is the main connective tissue in the circulatory system, but it's a liquid connective tissue. Blood tissue is in the same family as bone and cartilage, but instead it has a liquid medium that holds it together.
The answer is pronuclei. A pronuclei is the state of the
nucleus of either the sperm or the ovum after the sperm has entered the ovum
but the two nuclei have not yet fused. When the sperm enters the ovum, the membrane
of the sperm pronuclei dissolves hence leaving no barrier for the two genetic
materials to combine.
Bacteria - eubacteria kingdom - binary fission
blackworms - Oligochaeta - fragmentation
Hydras - hydrozoa - budding
copperheads - Reptilia -<span> parthenogenesiss
Fungi - Hypha - sporulation
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btw blackworms, hydras, copperheads. Are all in the Animalia kingdom, the thing in the middle is the class.
The asnwer is Angiosperms