Not quite; they have to give birth to a calf in order to lactate.
No. Cows can be open and still be able to lactate. They must have GIVEN BIRTH to a calf in order to be able to lactate.
Cows do not lactate all the time. They typically lactate after giving birth to a calf and continue to produce milk for about 10 months to 12 months, until they are ready to give birth again.
No.
Yes, cows mate with bulls to reproduce. Bulls are the male cattle that mate with the female cows to produce offspring. This mating process is essential for the continuation of the cattle population.
It's a way of producing offspring and to pass one's genes on to the next generation. Cows don't live forever (nor do any animal on this planet), so it's crucial to mate to have other offspring pass on their genes to the next generation.
No, not usually.
No. Heifers, being young female cattle, don't lactate until after they've had their first calf, which is typically at 24 months of age. A heifer remains a heifer, from birth, until she's had her first or second calf, whereby she is considered a cow. But until then, heifers don't lactate like cows do, and when they do lactate after birthing a calf, they typically produce less milk than their older counterparts.
it is called serving
Because people milk them. Same stimulation as if a calf was sucking the teat.
Cows can breed for as long as they are productive, which can range from one to 15 years or more.
Yes they do because all cows are girls and all bulls are boys
No ... cows can't survive underwater, and the octopus can't graze on land ...