1.2.8
A. Corpus luteum
B. Progesterone
- It is necessary for the formation of Graafian follicles in cows.

1.2.9
A. Ovulation
B. Gestation
- The release of female reproductive cells for fertilization.

1.2.10
A. Flush feeding
B. Concentrate feeding
- Supplementary feeding that promotes ovulation rate.

1.2.11
A. Seminiferous tubules
B. Leydig cells
- Produce the seminal fluid for the lubrication of the urethra.

1.2.12
A. Lack of Libido
B. Impotence
- A bull does not show any interest in a cow on heat.

1.2.13
A. Teats
B. Milk veins
- The site of milk synthesis.

1.2.14
A. Dystocia
B. Lactation
- The period that starts after parturition and normally continues for an average of 305 days in producing dairy.

1.2.15
A. Embryo transfer
B. Nuclear transfer
- The aim of this process is to improve and preserve the genetic potential of the herd.

1.2.16
A. Cryptorchidism
B. Hypoplasia
- One or both of the testes do not descend into the scrotum and remain in the abdominal cavity.

1.2.17
A. Sodium citrate and penicillin
B. Egg yolk and water
- Dilutants mixed with semen.

1.2.18
A. 90 days
B. 60 days
- The dry period of a dairy cow before their next parturition.

1.2.19
A. Reproductive cloning
B. Therapeutic cloning
- New organism is created.

1.2.20
A. Cryptorchidism
B. Repeat-breeder syndrome
- Condition where female animals are unable to conceive after several attempts at insemination.

The corpus luteum is a temporary endocrine structure involved in reproduction in females. It is necessary for the production of progesterone, which plays a crucial role in regulating the menstrual cycle and preparing the uterine lining for pregnancy, but it is not primarily responsible for the formation of Graafian follicles.

1.2.9: A. Ovulation

Ovulation is the process during which an ovary releases an egg (or oocyte), making it available for fertilization. It is a key event in the menstrual cycle of female animals.

1.2.10: A. Flush feeding

Flush feeding refers to the practice of providing a high-energy diet to female animals before and during the breeding season to increase the ovulation rate and improve fertility.

1.2.11: Neither A nor B

Seminal fluid for lubrication is actually produced by accessory sex glands such as the prostate gland and the bulbourethral glands in males. Seminiferous tubules and Leydig cells are involved in sperm production and hormone secretion, respectively.

1.2.12: A. Lack of Libido

A lack of libido in a bull refers to an absence of sexual interest or desire, meaning the bull shows no interest in cows that are in heat.

1.2.13: Neither A nor B

Milk synthesis takes place in the mammary glands, specifically in the alveoli, not in the teats or milk veins.

1.2.14: B. Lactation

Lactation is the period in which a female mammal produces milk following parturition, typically lasting about 305 days in dairy cows.

1.2.15: A. Embryo transfer

Embryo transfer is a reproductive technology used to improve and preserve the genetic potential of a herd by transferring embryos from donor females to recipient females.

1.2.16: A. Cryptorchidism

Cryptorchidism is a condition where one or both testes fail to descend into the scrotum and remain in the abdominal cavity, potentially affecting fertility.

1.2.17: B. Egg yolk and water

Egg yolk and water are mixed with semen as dilutants to help preserve its viability during storage and transport.

1.2.18: A. 90 days

The dry period of dairy cows, which is the time between lactation cycles where they are not producing milk, typically lasts for about 60 days, so the correct choice is B. This is vital to ensure that the cow can recuperate before the next calving.

1.2.19: A: Reproductive cloning

Reproductive cloning involves creating a new organism that is genetically identical to the donor organism.

1.2.20: B. Repeat-breeder syndrome

Repeat-breeder syndrome is a condition in female animals where they are unable to conceive after multiple insemination attempts.