CAC Livestock & Animal Science Flashcards
6 cards from real CAC practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 6 CAC Livestock & Animal Science flashcards as text
Which body condition score (BCS) range is generally considered optimal for beef cows at calving?
Answer: 5–6
A BCS of 5–6 at calving ensures adequate energy reserves for milk production and rebreeding.
The gestation length for a beef cow is approximately how many days?
Answer: 283 days
The average gestation period for beef cattle is approximately 283 days.
Which of the following vaccines is part of a standard pre-breeding vaccination program for beef heifers in the US?
Answer: IBR/BVD/PI3/BRSV (modified live)
Modified live IBR/BVD/PI3/BRSV vaccines are routinely used to protect breeding heifers from reproductive diseases.
What is the primary purpose of synchronizing estrus in a beef cow herd?
Answer: Compress the calving season for management efficiency
Estrus synchronization tightens the calving window, allowing producers to manage labor, creep feeding, and weaning more uniformly.
Expected Progeny Differences (EPDs) are used by beef producers primarily to:
Answer: Predict the genetic potential of offspring for specific traits
EPDs express the expected difference in performance of a sire's offspring compared to the breed average for traits like birth weight and weaning weight.
Which internal parasite most significantly impacts weight gain in stocker cattle on US pastures?
Answer: Barber pole worm (Haemonchus contortus)
Haemonchus contortus is a blood-sucking abomasal parasite that causes significant production losses and anemia in grazing cattle.