Babies!
Depending on their species, it could be cubs, kitten; hippopotamus.
Hybrid animals cannot have offspring.
An inherited trait is a charateristic passed from parents to offspring.
In plants - no seeds, no fruit. In most animals - no baby. In some insects - male offspring. When these insects' eggs ARE fertilized you get female offspring!
Mitosis
Selective breeding. It's how all traditional domesticated crops and animals were modified from their wild precursors. Think wolf -> dog.
No, not all animals need to mate to have offspring.
Offspring
All mammals have teats, as they are how the offspring are fed milk.
All mammals and some arctic snakes
genes 23 from each parent
All animals have some type of defense mechanism; support their life by consuming nutrients; produce offspring.
Hybrid animals cannot have offspring.
the offspring of most animals are a mixture of features from both
Offspring
The females do the rearing of the offspring. In fact, some male animals are known for eating their own offspring, like Lions. Males are usually highly aggressive to their offspring.
Taking care of offspring is a time and energy consuming undertaking. If an animal produces many offspring there is little need to care for them all.
Animals don't always produce identical offspring. Like cats for an example.