Which of the following animals are grouped into a clade based on genetic evidence alone, and not because of a shared trait or body plan? [Multiple answers may be correct, incorrect answers will results in a loss of marks to a minimum of zero] Select one or more: a. Mollusc b. Chordate c. Cnidaria d. Arthropod e. Platyhelminth f. Porifera g. Vertebrate h. Nematode

The question is asking for animals that are grouped into a clade based on genetic evidence alone, and not because of a shared trait or body plan. This means we are looking for groups of animals that may not look similar or have similar traits, but are grouped together because their genetic evidence suggests they share a common ancestor.

a. Mollusc - This is a group based on shared traits and body plan, not just genetic evidence. They all have a soft body that in many species is protected by a hard shell.

b. Chordate - This is a group based on shared traits and body plan, not just genetic evidence. They all have a notochord, a dorsal nerve cord, pharyngeal slits, an endostyle, and a post-anal tail.

c. Cnidaria - This is a group based on shared traits and body plan, not just genetic evidence. They all have specialized cells that they use for capturing prey.

d. Arthropod - This is a group based on shared traits and body plan, not just genetic evidence. They all have an exoskeleton, a segmented body, and jointed appendages.

e. Platyhelminth - This is a group based on shared traits and body plan, not just genetic evidence. They all have a flat body.

f. Porifera - This is a group based on shared traits and body plan, not just genetic evidence. They all lack true tissues and organs and have a porous body.

g. Vertebrate - This is a group based on shared traits and body plan, not just genetic evidence. They all have a backbone or spinal column.

h. Nematode - This is a group based on shared traits and body plan, not just genetic evidence. They all have a cylindrical, worm-like body.

So, none of the options listed are grouped into a clade based on genetic evidence alone. They all have shared traits or body plans that also contribute to their classification.