Unit 9
No description yet. This curated deck is ready for daily study.
Card preview (19)
True or False? Today’s horses are an evolutionary change from the eohippus which lived long ago.
True
The sequence of events that leads to a certain characteristic being selected by the environment is called ___________ selection. variable natural
natural
True or False Mutation can be the result of other genetic abnormalities such as extra chromosomes or chromosomes crossing or breaking.
True
True or False? In a population certain individuals may be genetically better suited for the environment than others.
True
True or False? Brahman cattle (Bos indicus) are known for their heat tolerance, because they have adapted to the hotter climate of Asia and Africa.
True
Through controlled use of radiation, chemicals, or physical disruption of the faithful translation of the genetic code (DNA) mutations can be brought about in the___________. hereditary laboratory evolution field
laboratory
True or False? A mutation is a random inheritable event.
True
Exposure to certain toxic (poisonous) chemicals can cause ___________. mutation health problems weak offspring evolution
mutation
Plant breeders have taken advantage of a natural mutation for a strain of rust resistance in_________. rice wheat corn barley
wheat
_____________ is a change in the genetic makeup of a population with time. Variation Evolution
Evolution
What did Darwin observe about the birds in the Galapagos islands? Wings Tongues Beaks Feet
Beaks
Darwin observed that populations can have way more ______ than resources available. water food mates offspring
offspring
Who first identified Natural Selection? Aristotle Charles Darwin Boden G. Mendel
Charles Darwin
What caused the moth to develop darker wings? Soot in the air from coal burning plants. Black Powder Darker tree bark Random selection
Soot in the air from coal burning plants.
The mutation that is causing early term abortions of calf embryos is ______. recessive dominant
recessive
The three modes of selection are: Directional, Fluctuating, & Sexual Directional, Sexual, & Dominant Directional, Stabilizing, & Sexual Directional, Stabilizing, & Flucuating
Directional, Stabilizing, & Sexual
Why is this a bad mutation if milk yields are increased?
Even though milk yields are increased it is not a good mutation because the cattle can not reproduce.
Farmers assumed that the reduction in _____ is primarily due to the negative energy balance at peak of lactation. faris feed fertility
fertility
Which cattle breed is experiencing this mutation the most? Nordic Red Cattle Nordic Holstein Danish Jersey
Nordic Red Cattle