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Why is the number of offspring produced by fishes and frogs higher it is in mammals?
Wiki User
∙ 9y ago
Frogs and fish have extremely high mortality rates which requires the production of large numbers of eggs so that a few survive. Their eggs and offspring are generally unprotected, and rely on instinct for much or their early survival. Mammals produce small numbers of offspring that develop in utero, and are cared for, protected and trained for an extended period of time before they are required to fend for themselves.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoBecause mammals care for and nourish their young, they could not possibly deal with so many as fish give birth to.
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Why internal fertilization often produces fewer offspring than external fertilization?
Internal fertilization utilizes a placenta and womb and this limits the number of offspring that can be produced. Internal fertilization also has a higher birthrate than external fertilization.
What is the food of mammals?
Different mammals eat different food. Mammals occupy varying places on a food chain. Some mammals are vegetarians, they are primary consumers. Some mammals are carnivores, they are higher level consumers. Some mammals are omnivores.
What order of mammals includes humans and gorillas?
higher order
Can brother and sister cows mate?
They can, however, this is an example of insest and the offspring will be at a higher risk for abnormalities.
Which organ systems share the responsibilty of allowing higher level animals like mammals to apply force to objects?
The organ systems that share the responsibilty of allowing higher level animals like mammals to apply force to objects are mammalian systems.
Why do mammals give birth to living young?
most mammals are too big to lay eggs, because big eggs have a higher chance of getting accidentally squished
Why do mammals need more oxygen than reptiles?
Mammals maintain a higher body temperature. In order to do so, they require more energy and that requires more oxygen.
How does frequency of waves affect the pitch of the sound produced by vibrating objects?
The higher the frequency, the higher the pitch.
Why car crashes more dangerous at higher speeds than at lower speed?
Higher g's produced at higher speeds are harder to survive.
What is the principle of the law of supply?
the higher the price, the larger the quantity produced
What are differences between the mouth of a fish and sharks?
a shark is a fish in the higher class of fishes known as 'cartilaginous' fish because they have skeletons made of cartilage
Why do trout have a higher energy efficiency than cows?
Because cows are mammals and trouts are cold blooded.
