Identify specimen A and B without reasons

Which type of organism is missing from the food web seen in the illustration? primary consumers decomposers primary producers secondary consumers

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.

What is the key to the recognition of codominance?