Final Exam - Quizzes Flashcards
The cumulative growth curve is really:
a) A measure of average gain in time over time
b) A good way to accurately determine the maximum growth velocity
c) Stair stepped due to sporadic growth spurts
d) Shaped like the letter U
c) Stair stepped due to sporadic growth spurts
Which statement about the components of the growth curve is correct?
a) An animal stops growing when it enters the self-inhibiting phase of development
b) The asymptote represents the point of maximum growth velocity
c) The point of inflection is the time when animals grow the fastest
d) Growth at the beginning of the self-accelerating phase is usually highly complex
c) The point of inflection is the time when animals grow the fastest
A body part with an allometric growth coefficient (b-value) of <1 grows:
a) Late and slowly compared to the rest of the body
b) Late and fast compared to the rest of the body
c) Early and fast compared to the rest of the body
d) Early and slowly compared to the rest of the body
d) Early and slowly compared to the rest of the body
John Hammond made important observations about the proportions of animals as they grow including that:
a) Bone develops before nerve and muscle tissue
b) Body components that are chronologically more important develop first
c) Extremities complete their development first
d) Development is completed from the inside out
c) Extremities complete their development first
Rearrange the descriptions in the table below to match the different types of growth models:
Growth models:
- Physiological growth
- Absolute growth
- Cumulative growth
- Relative growth
Description
A. Change in weight over time
B. Refers to specific physical/chemical stages of maturity
C. Growth in relation to total weight
D. Plots weight gain per unit of time over time
Physiological = B, Absolute = D, Cumulative = A, Relative = C
Growth can be compared as a function of physiological age when:
c) We want to compare animals at specific physical and chemical stages of maturity
a) We want to compare animals at the same time during their development
d) B & C
e) A & B
b) We want to compare animals when a single system reaches physiological maturity
d) B & C
An absolute growth rate curve:
a) Peaks when the growth rate is highest
b) Peaks when an animal is heaviest
c) Tells you the weight of an animal over time
d) Is a good way to determine the asymptote
a) Peaks when the growth rate is highest
The importance of new growth relative to the growth that has already happened is best described using:
a) (Y2-Y1)/(lnt2-lnt1)
b) Absolute growth rate
c) Cumulative growth
d) Relative growth rate
d) Relative growth rate
As the body grows, the proportions of different chemicals changes according to the following:
a) Water increases, fat increases, protein increases
b) Water decreases, fat decreases, protein increases
c) Water decreases, fat increases, protein decreases
d) Water increases, fat increases, protein decreases
c) Water decreases, fat increases, protein decreases
Which answer is correct about how bone composition changes with age?
a) The proportion of water increases
b) The proportion of protein increases
c) The proportion of bone ash decreases
d) The proportion of fat increases
d) The proportion of fat increases
Heredity…..
a) Results from selection of mutations that arise in genes
b) Is an animals set of observable traits
c) Is the process of passing along genes from one generation to the next
d) Refers to the unique set of genes that an animal possesses in its genome
c) Is the process of passing along genes from one generation to the next
The reason(s) for abnormally high growth rates achieved during compensatory growth include:
- Higher feed intake
- Lower basal energy metabolism requirements due to decreased visceral weight
- Reduced somatostatin levels
- Answers 2 and 3 are correct
- Answers 1 and 2 are correct
- Answers 2 and 3 are correct
The heritability value for meat tenderness is 0.29 which is:
a) Intermediate, meaning moderately heritable
b) Low, meaning difficult to breed for
c) Suboptimal, meaning difficult to breed for
d) High, meaning highly heritable
e) Intermediate, meaning highly heritable
a) Intermediate, meaning moderately heritable
Which answer about fat deposition in cattle, sheep, pigs and poultry is false?
a) Poultry deposit similar proportions of subcutaneous, visceral and intermuscular fat
b) Swine favor subcutaneous fat deposition
c) Cattle favor intermuscular and subcutaneous fat deposition
d) Sheep favor intermuscular and visceral fat deposition
d) Sheep favor intermuscular and visceral fat deposition
What statement about muscle development in beef vs dairy cattle breeds is false?
a) Beef breeds develop more muscle fibers throughout the carcass during prenatal development
b) Selection for muscle is inversely related to milk production
c) Reduction in muscle fiber numbers in milk breeds occurs prenatally
d) Animals used for milk production are less muscular
e) Selection has changed muscle distribution between beef and dairy breeds
e) Selection has changed muscle distribution between beef and dairy breeds
Identify which is incorrect for the order of sex class maturation for the species listed below (earliest to latest)
E. A & D
D. Pullet, Capon, Cockerel
A. Gilt, Barrow, Boar
B. Ewe, Wether, Ram
C. Heifer, Steer, Bull
A. Gilt, Barrow, Boar
The mature frame size in cattle can be calculated from:
a) Average daily gain and feed intake
b) Genotype and environment
c) Relative growth rate and age
d) Hip height and age
e) Breed and sex
d) Hip height and age
Select the most accurate missing word: At the same chronological age, large framed animals are physiologically ___________ than small framed animals.
a) Fatter
b) Older
c) Younger
d) Weaker
c) Younger
