A karyotype:
A) shows chromosomes as they appear before replication.
B) can show the number of chromosomes in a cell.
C) can reveal the location of a gene.
D) can reveal the presence of cancerous genes.
Answer: B
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If an animal finds his way by the type of wayfinding known as piloting, then he is using ____
a. familiar landmarks to guide his journey b. the sun's position in the sky to orient himself c. both the sun's position and a mental map d. the Earth's magnetic field to orient himself e. another animal to lead the way as he learns the route
Sea turtle adaptations for buoyancy do not include: a. fused skeleton to shell
b. light, spongy bones. c. fatty deposits. d. reduced shell size compared to terrestrial turtles.
The start signal in an mRNA strand is
a. UAG. b. GUA. c. AUG. d. TAG. e. ATG.
Why have tomatoes been genetically modified?
A) to improve absorption of vitamins in the human body B) to grow rapidly before temperatures fall below freezing C) to kill insect pests on contact D) to have a longer shelf life in grocery stores