Practice Exam Key 101-150

Question 1

102. The gestation time for cattle is:

Answer 1

283 days

Question 2

103. Which trait has the highest heritability estimate in cattle?

Answer 2

Post-weaning rate of gain

Question 3

104. The average age of puberty in sheep is:

Answer 3

6 months

Question 4

105. A cattle producer that produces breeding stock including bulls and females for cow-calf operations is commonly called a:

Answer 4

seedstock/purebreed breeder

Question 5

106. The most important factor when formulating a ration for livestock is:

Answer 5

Total digestive nutrients

Question 6

107. The gestation time for sheep is:

Answer 6

148 days

Question 7

108. Heifers most commonly reach puberty at the average age of:

Answer 7

7 months

Question 8

109. Estrus in cattle usually occurs every:

Answer 8

21 days

Question 9

110. EPD stands for:

Answer 9

Expected progeny difference

Question 10

111. A market where cattle are sold by public bidding, with the animals going to the highest bidder is known as a(n):

Answer 10

Auction market

Question 11

112. In swine, a male that has been castrated before reaching sexual maturity is called a:

Answer 11

Barrow

Question 12

113. A system that is used for trading contracts for future delivery of cattle is known as:

Answer 12

Futures markets

Question 13

114. In 1985, a one dollar per head checkoff for every head of beef sold in the United was established as a result of the passage of the:

Answer 13

Beef Promotion and Research Act

Question 14

115. The process of placing sperm in the female reproductive tract by some other means than natural mating is known as:

Answer 14

Artificial insemination

Question 15

116. The process of preparing calves for the stress of being moved into the feedlot is called:

Answer 15

Preconditioning

Question 16

117. The rate or percentage of animals becoming pregnant.

Answer 16

Conception rate

Question 17

118. The removal of all or part of the tail from sheep is referred to as:

Answer 17

Docking

Question 18

119. A method of animal identification that is a puncture in the skin of numbers or letters is known as:

Answer 18

Tatoo

Question 19

120. A selective form of breeding in which the sire and dam are related which some refer to as a mild form of inbreeding is called:

Answer 19

Linebreeding

Question 20

121. The average daily gain for growing cattle on full feed.

Answer 20

3 pounds a day

Question 21

122. Which of the following traits is considered undesirable when judging market lambs?

Answer 21

Early maturing

Question 22

123. Cattle are in a class of animals which consume only plant products known as

Answer 22

Herbivores

Question 23

124. The gestation time for swine is:

Answer 23

114 days

Question 24

125. When evaluating swine performance data, litter weights are adjusted to a standard of how many days?

Answer 24

21 days

Question 25

126. The most common swine identification system is:

Answer 25

Ear notching

Question 26

127. The mating of animals of different family lines within the same breed is:

Answer 26

Outcrossing

Question 27

128. The testes produce sperm cells and the male sex hormone:

Answer 27

Testosterone

Question 28

129. The age at which an animal reaches sexual maturity is:

Answer 28

Puberty

Question 29

130. The length of the estrus cycle for a ewe is:

Answer 29

14 to 20 days

Question 30

131. The estrus cycle in swine occurs:

Answer 30

Every 21 days

Question 31

132. The process of taking food nutrients through the intestinal wall is:

Answer 31

Absorption

Question 32

133. The reflex and response that an animal has at birth is:

Answer 32

Instinct

Question 33

134. The normal body temperature of sheep and swine is:

Answer 33

Above 102 degrees

Question 34

135. Sheep and cattle both have multiple stomachs referred to as a(n):

Answer 34

Ruminant

Question 35

136. The growth and development of animals prior to birth.

Answer 35

Prenatal

Question 36

137. A permanent change in the genotype of an offspring from that of its parents.

Answer 36

Mutation

Question 37

138. An impairment that affects the performance of the vital life functions.

Answer 37

Disease

Question 38

139. The most common sheep identification system is:

Answer 38

Ear tags

Question 39

140. What hormone is produced primarily by the ovaries in female animals?

Answer 39

Estrogen

Question 40

141. Cattle have how many pairs of chromosomes?

Answer 40

30

Question 41

142. The use of living organisms or their products (livestock production) is also known as:

Answer 41

Biotechnology

Question 42

143. External fat on a lamb carcass is measured between which two ribs?

Answer 42

12 and 13

Question 43

144. The tube that carries air to an animal’s lungs.

Answer 43

Trachea

Question 44

145. The use of liquid nitrogen for storage of semen and embryos.

Answer 44

Cyropreservation

Question 45

146. The expected yield of a hog with a USDA quality grade of No. 1 is:

Answer 45

60.4% or greater

Question 46

147. The most important wholesale cut of lamb is

Answer 46

The leg

Question 47

148. The age of the beef animal and the amount of ________ of the carcass.

Answer 47

Quality grade

Question 48

149. The amount of fat cover on a market lamb is referred to as:

Answer 48

Finish

Question 49

150. When evaluating sheep, the term that refers to ruggedness and stamina is:

Answer 49

Constitution

Question 50

101. A method of animal identification that uses very low temperature to change pigment
     color of the skin is:

Answer 50

Freeze brand