gr 7,compare between different groups of mammals?who will win first in my students

Posts : 185 Join date : 2010-01-28

Placental mammals	marsupials	monotremes	Point of comparison
3	2	1	*How young begin life?*
6	5	4	*How the young get their milk?*
8	7	*It is not mentioned*	*How long is the gestation period?*
11	10	9	*Examples on each type* (*if more than one type is found*)

Hi Mrs. SALLY I miss u sooooooooooooooooo Much I love you

This is the answer of the comparasion:

Monoterms

1.After the young hatch, they stay in the pouch for
six to eight weeks.

2.In the spiny antear the young drink milk that seeps
out of pores on the mother's skin.While the duck-billed
platypus the tiny young feed by lapping at the milk that
oozes from slits onto the fur of thier mother's belly.

3.Not mentioned.

4.Spiny antears and duck-billed platypus.

Marsupials

1.They are born at an early stage of development .
and they usually continue to develop in apouch on thier
mother's body.

2.From an organ in it's mother's body called mammary
glands.

3.Length of time between fertlization and birth.

4.Koalas, Kangroos, and opossums.

Placental

1.The young develops inside it's mother's
body untill it's body systems ca function
indepently.

2.They drink milk produced by thier mothers from
an organ called mammary glands.

3.It depends on the size of the mammal, for e.x.
an elephant

averages about 21 mont, but mouse
it's only about 20 days.

4.Giraffe, elephant

,mouse, and bats.

HOGO

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