Question

can you answer these
According to the cladogram, which organisms are in the smallest clade with birds?

A cladogram is shown. Crocodiles are in the smallest clade with birds.
crocodiles
primates
rodents and rabbits
sharks

Dr. Digger, a paleontologist, finds a fossil that he describes in his journal.

The creature was approximately 1 meter long, with its backbone fused into a large shell covering the body cavity. It had a beaklike mouth, without teeth, and all four limbs were in the form of flippers.

Based on anatomical similarities, to which modern animal is Dr. Digger’s creature most closely related?
zebra
bony fish
sea turtle
snake

Julia is trying to place a duckbilled platypus, lizard, bear, and monkey on a phylogenetic tree. She learns that the duckbilled platypus, bear, and monkey are classified as mammals. She also learns that mammals share a common ancestor with reptiles. Which additional piece of information will be most helpful to Julia to properly build her phylogenetic tree?
The platypus has fur like other mammals.
The platypus does not have feathers like a bird.
The platypus lays eggs like a reptile.
The platypus does not have fins like a fish.

Which of the following are Phylogenetic trees also know as ?
Cladogram
Clade
Node
Linnaean

Consider the cladogram.

A cladogram is shown. Roundworms have the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom.

Which group of organisms has the derived characteristics of true tissues, bilateral symmetry, and a pseudocoelom?
sponges
roundworms
annelids
chordates

Answer 1

1) Crocodiles — they share the smallest (most recent) clade with birds.

2) Sea turtle — the fused shell, beaklike mouth, and flippered limbs match a turtle.

3) "The platypus has fur like other mammals." — fur (hair) is a shared derived trait that helps place the platypus with other mammals on the tree.

4) Cladogram — phylogenetic trees are also called cladograms.

5) Roundworms — they possess true tissues, bilateral symmetry, and a pseudocoelom.