Unit 9 Flashcards
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
