Identify the three embryonic tissue layers of bilaterally symmetrical animals.

Which of the following is a synapomorphy for mammals? a)Lactation b)Limbs c)Circulatory system d)Amniotic egg

prepare sketches of Four-cell sea urchin embryo

Define mammary gland with examples in class-mammalia?

What does radial symmetry means? What is the type of symmetry found in chordates? Which are other phyla of the animal kingdom that present species with radial symmetry?

You are given an embryo with eight cells and you carefully separate them and allow them to develop in separate containers. Each of the cells forms a complete embryo that develops normally into an adult animal. How would you categorize your animal? It is a protostome. It has determinate cleavage. It has spiral cleavage. It is an annelid, mollusk, or arthropod. It has indeterminate cleavage.

Identify the body parts of the frog

The largest cycloneuralians are also the only ones with external fertilization. Which phylum is this? Explain the relationship between adult body size, mode of fertilization, and type of larval development in marine invertebrates.

What are four synapomorphies and four symplesiomorphies of the vertebrate body plan?