7Seed AnatomyThere are 2 different types of seeds that get produced by flowering plants.Seeds contain something called seed leaves or cotyledons.
8Seed AnatomyBean plants are called dicotyledons because they produce seeds with 2 seed leaves.
9Seed AnatomyCorn plants are called monocotyledons because they only produce one seed leaf.
10Seed AnatomyAll seeds contain structures that will grow into the main parts of the plant.To understand the diagrams better, take a couple of minutes to look up the following definitions:GerminateRadicleHypocotylEpicotyl
11Eggs Most animals lay eggs. Eggs have The zygote Some nutrients Some kind of protection (shell, jelly, egg case)
12EggsSome animals produce single egg cases with multiple (thousands) embryos in one.tapeworm
13EggsOthers produce eggs that contain only a single embryo surrounded by a shell.birdsreptilesThese are called amniotic eggs.
15EggsAmniotic eggThe embryo is cushioned by the amnion (a fluid filled sac)The yolk sac stores food for the embryoThe allantois holds wastes produced by the embryoThe chorion controls movement of gases and also wastesThe albumen cushions and is additional food
16Eggs Different animals care for their eggs in different ways: Birds sit on them to keep them warmSea turtles bury them in the sand and the babies dig themselves outTapeworms release their egg cases and the eggs are released in the feces on the host animal usually to be eaten by other animals that they can use as a host
17Eggs Mammals that lay eggs are called monotremes. There are 3 kindsDuck-billed platypus2 kinds of spiny anteaterThey all live in Australiaor New Guinea.
18EggsThese mammals care for their eggs during incubation just like birds do.
19Embryos Develop in the Mother All other mammals have their embryos develop in the mother.
20Embryos Develop in the Mother Marsupials:Kangaroos, koalas, opossums…The embryos don’t develop for very long in the uterusThe young are born very tiny and immature so they crawl from the birth canal to the pouch where the can attach to a nipple on a mammary gland.They can return to the pouch to feed once they are mature enough to venture out.
21Embryos Develop in the Mother Placental mammalsHumans, etc.Embryos develop much longer in the mother.The word placental comes from placenta.Find the following definitions to better understand placental mammals:PlacentaFetusUmbilical cord