Why do you think most hybrid animals are rare and typically live in captivity (zoos)?

Hybrid animals are most likely to be kept in zoos because animals of its same species might think its and intruder and try to kill it.

1. dermis

2. chemical

3. urine

4. viruses

5. antibodies

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.