Which of the following is an example of symbiosis? a. barnacles living on a whale’s skin b. a tree obtaining nutrients from the soil c. phytoplankton absorbing the sun’s rays d. a blue whale feeding on zooplankton

a. barnacles living on a whale’s skin

Explanation:

Symbiosis is a interaction which occurs between two different species. In this interaction the organisms may get benefit, harm or may not be affected. Barnacles and whales are interconnected by commensalism symbiotic relationship. In this relationship the one species receives the benefit without causing any harm to other.  

Barnacles feed by attaching themselves to the back of the whales where they eat the microorganisms and the whale remains unaffected.

spiders belong to a group of arachnids.

arachnids have the following traits :

they have two body parts.

they have eight legs unlike insects which have 6 legs.

they have no wings.

these traits distinguish them from insects.

the information that antonio is doubting us the statement that spiders differences are as a result of being first to evolve.

this is because the evolution of one species is independent of the other species.

the unequal cytoplasmic division that  results  in  one egg  and three polar bodies ensures that a fertilized  egg has  ample nutrients  forits journey  to  the uterus.