Which of the following organisms would you expect to find in an ecosystem that is in the initial stages of secondary succession?
roses
oak trees
crabgrass
bears
otters
question 25 (multiple choice worth 2 points)
which location would likely have the highest level of biodiversity?
a secluded lake that can only be reached by trail on an unpopulated island
a tropical rainforest that has been clear-cut to create highways and farmland
a polluted river that is now closed to motorized boats and is being cleaned up
a mountain top that can sustain only a few certain species of animals and plants
a corn field in the midwest that is planted only once every three to four years
question 26 (multiple choice worth 2 points)
which scenario would most likely result in genetic drift?
a botanist grafts together shoots from two different kinds of pea plants.
the grass growing in a field is regularly grazed by a herd of cattle.
loggers cut down all but a few spruce trees in a forest.
a gardener picks the prettiest roses from his garden to give to friends.
annual droughts periodically thin the population of cacti growing in a desert.

Is a measure of the resistance to flow. a high liquid has a high resistance to flow and flows slowly. the ancients thought everything in the world was made of 4 we now know that there are 94 naturally occurring and scientists have created another 24 i am certain they will create even more. honey flows slowly because it has a high to flowing. a can be separated by physical means because it contains more than one pure substance and 2 pure substances are not chemically bonded to each other. a cannot be separated by physical means. all matter is made up of all elements are with the same number of protons. if it is just a single or many bonded together, if all of them have the same number of protons, it is an element. in a piece of pure iron metal, all the are joined together, that piece of iron metal is called elemental iron. a single of iron is called elemental iron. a mixture has differences from place to place. we might need a microscope to see them or they might be obvious to the unaided eye. there are surfaces separating it into different phases. a mixture is the same everywhere. it is uniform. there are no surfaces separating it into different phases. if different kinds of atoms (different elements) are bonded together by their electrons, it is called a there are physical means of to isolate the different pure substances in a mixture and there are chemical means of to isolate the different elements in a compound. 1. element 2. compound 3. mixture 4. heterogeneous 5. homogeneous 6. pure substance 7. atoms 8. separation 9. viscosity 10. resistance