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Eggs that cushion the embryo in fluid and protect it with membranes and a shell developed first in?
Reptiles were the first group whose eggs cushioned the embryo in fluid and protected it with membranes and a shell. This prevents eggs from drying out and allows them to be laid away from water.
Why doesn't a reptile have a shell membrane?
Reptile eggs have shell membranes.
What replaces the membranes and nutrition source of amniotic eggs in organisms that exhibit live birth without amniotic eggs?
allantois
How many shell membranes in egg?
Eggs have selectively permeable membranes, just like those of cells (they can only allow certain materials or objects to pass through, kind of like a screen door).
Why does an egg have film on it?
Eggs have two transparent protein membranes that serve to protect the inner parts from bacteria.
How many membranes are in the chloroplasts?
Nucleus is surrounded by a double membrane.
How many membranes does cyoplasm have?
7
Are all hen eggs in hard shells fertilized eggs?
NO- the vast majority of the commercial eggs are infertile- the hen never sees a rooster. Fertilization of the egg happend BEFORE the shell membranes and shell are added. Fertilization is not needed to form a shell.
Do blue-tongued lizards lay eggs?
Yes, blue-tongued lizards are ovoviviparous, meaning they give birth to live young rather than laying eggs. The young are born in thin, transparent membranes, which they quickly break out of.
How many membranes is the chloroplast surrounded by?
2
How many membranes do chloroplasts contain?
double!
How many membren situated in mitochondria?
There are two membranes. Mitochondria are double membranous
