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What else can I help you with?
Are polar bears internal or external fertilization?
they have external fertilization , PS i learned it in science :P zz this is all wrong...it does NOT use exernal fertilization...external fertilazation is for fish and stuf,but internal is for humans and mamals.
Why do animals undergoing external fertilization lay large number of eggs and sperms?
The eggs are not limited by the space inside the mother's body as they grow. Also fewer of the eggs will grow into adults, so more eggs are needed (otherwise, that species would have become extinct)
How many sperms are needed for fertilization?
Only one.
Why do animals that practice external fertiliztion lay m ore eggs?
External fertilization means that it takes place outside of the body, which also means the eggs and sperm are exposed to a lot more danger, and that the chances of a successful fertilization are lower. Because of this, the amounts produced are much higher to give a reasonable chance that there will be offspring.
Why the uterus needs to prepare before fertilization?
For implantation to "take" the endometrium needs to be in perfect condition. One way to ensure that state is to make a brand-new one as needed. And that's the way that primates do it.
What is the steady state or constant condition needed in the body?
The steady state or constant condition needed in the body refers to the state where the internal environment remains relatively stable despite external changes. This is important for optimal functioning of physiological processes such as temperature regulation, pH balance, and nutrient levels. Homeostasis mechanisms help maintain this steady state by continually adjusting internal conditions to counteract external disruptions.
Why the uterus needs to prepare itself before fertilization?
For implantation to "take" the endometrium needs to be in perfect condition. One way to ensure that state is to make a brand-new one as needed. And that's the way that primates do it.
Do seed plants rely on water for fertilization?
Some plants have mobile gametes: mosses, liverworts, ferns, and these can travel through moist soil under their own power. Most plants however require some active agent to carry their pollen for them. In the case of conifers and grasses this agent is the wind. Most angiosperms use insects: mites, flies, bees, beetles and such. A few use hummingbirds, bats, and honey bears.
What are two crucial reproductive adaptations animals needed to make in order to live on land?
One adaptation is the amniotic egg; a waterproof egg with a shell. It also has an amnion that will protect the embryo from drying out. The other is internal fertilization: when the sperm has to enter directly into the female because the sperm does not survive in the air. Previously animals, like sponges, had to spread their sperm through the water in hopes of fertilization. Both of these adaptions are crucial to life on land and we would not be here without them.
Is flywheel needed for external combustion engine?
no
What problems were associated with colonizing land during the evolution of vertebrates?
1) Animals needed to withstand the effects of gravity. 2) Animals needed to reduce desiccation (the loss of water). 3) Animals needed to have a mode of transportation. 4) Animals needed protection against UV rays. 5) Animals needed to reproduce without water. 6) Animals needed to breathe air. 7) Animals needed to adjust their senses to life out of water.
What is passing pollen on to another plant?
Pollenization -- or fertilization. Needed for the plant to produce seeds or fruit
