Mississippi Science MAQ.7.4
The Standard
- MAQ.7
- Students will investigate characteristics of aquatic chordates.
Differentiate various life cycles found among animals (e.g., egg, tadpole, and adult stages of the amphibian life cycle; leathery eggs on land in reptiles; hard-shelled eggs in Aves; placental, marsupial, or monotremes in mammals; viviparous, ovoviviparous, and oviparous animals).
2026 Mississippi College- and Career-Readiness Standards for Science · Vertebrate Consumers
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students put frog life stages in order. They compare reptile and bird eggs, then group mammals by how their young develop. They distinguish animals that lay eggs, retain eggs inside the parent, or give birth to young nourished through a placenta.
What Mastery Looks Like
- A student can sequence frog eggs, tadpole, and adult, and tell leathery turtle eggs from hard-shelled bird eggs. They can identify dolphins as placental mammals, kangaroos as marsupials, and platypuses as egg-laying mammals. They can explain why a spiny dogfish that retains yolk-fed eggs differs from a dolphin.
Common Misconceptions
- Students may think every animal born alive develops through a placenta, but some sharks retain yolk-fed eggs until the young are born. They may think all mammals give live birth, but platypuses lay eggs. Some mistake tadpoles for fish rather than a stage in a frog's life.
How to Assess It
- Exit ticket: Put frog eggs, tadpole, and adult in order, then label turtle and gull eggs as leathery or hard-shelled. Identify a dolphin, kangaroo, platypus, and egg-retaining spiny dogfish by mammal group or birth mode.
Lesson moves
Ways to Teach It
Give pairs photo cards of frog stages, turtle eggs, gull eggs, dolphin calves, kangaroo joeys, platypus eggs, and dogfish pups to sort.
Ask: Both dolphins and spiny dogfish have live young. Where does each embryo get its food?
Play a speed sort with animal cards; students place each under egg-laying, retained egg, or placental live birth and explain one choice.
Show a photo of a sea turtle nest warning sign; have students write why the sand must stay undisturbed until hatching.
Keep exploring
Related Standards
- MAQ.6.5
Explain various life cycles found among animals (e.g., polyp and medusa in cnidarians, multiple hosts and stages in the platyhelminthic life cycle, and arthropo...
- L.4.2
Students will demonstrate an understanding of life cycles, including familiar plants and animals (e.g., reptiles, amphibians, or birds).
- L.4.2.1
Compare and contrast life cycles of familiar plants and animals.
- ZOO.5.7
Differentiate between complete and incomplete metamorphosis in insects’ life cycles.
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