The dinosaurs disappeared at the end of which
period?
a. Cretaceous
b. Permian
c. Triassic
d. Jurassic
e. Tertiary
Answer: a
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Humans cannot survive at sea by drinking salt water. However, marine vertebrates such as sea turtles and various sea birds can survive by drinking salt water. What do they have that humans do not?
A. Kidneys that are extremely good at producing a concentrated urine B. Body fluid concentrations that are similar to or greater than those of seawater C. The ability to secrete salts and wastes into their intestinal contents like an insect D. They use ammonia as their primary nitrogenous waste E. Salt glands
Matching. Choose the one most appropriate answer
for each. 1. ___ conservation biology 2. ___ coral reef 3. ___ ecoregion 4. ___ endangered species 5. ___ habitat fragmentation 6. ___ habitat island 7. ___ habitat loss 8. ___ hot spot 9. ___ indicator species 10. ___ strip logging 11. ___ riparian zone A. a reduction in suitable places to live B. organisms that give an “early warning” signal of changes in biodiversity C. new method of harvesting trees to preserve diversity D. a field of research whose goal is conservation of biodiversity E. species vulnerable to extinction F. broad land or ocean region defined by climate, geography, and producers G. ocean structure of amazing biological complexity H. locations where species are in greatest danger of extinction I. a national park is an example J. narrow corridor of vegetation along a stream or river K. isolated patches of habitat; this describes an island such as Oahu
Explain how IS elements produce target-site duplications when they move
What will be an ideal response?
Which of the following is the correct sequence of events during mitosis?
A) Nuclear membrane dissolves, chromosomes line up, chromosomes split, nuclear membrane forms B) Nuclear membrane forms, chromosomes line up, chromosomes split, nuclear membrane dissolves C) Chromosomes line up, nuclear membrane forms, nuclear membrane dissolves, chromosomes split D) Chromosomes split, nuclear membrane dissolves, nuclear membrane forms, chromosomes line up