Q1. You wish to collect organisms from the lowest part of the intertidal zone in your study area. To avoid having to swim or dive to collect them, you should time your work to coincide with: A spring high tide A spring low tide A neap high tide A neap low tide Q2. The graph below shows one 12-hour spring tide and one 12-hour neap tide. The rock face figure is an example of water level between high and low. Intertidal organisms will be exposed to the most air if they live between which tide markings in the graph? A B C D Q3. When Semibalanus is excluded from below the tidal zone: Many Chthamalus individuals grow well in the Semibalanus exclusion area. Semibalanus quickly overrun areas above the tidal zone. Chthamalus individuals do not grow at all in the exclusion area because they cannot reach and settle there. Any of the above are possible on different rocks (e.g., in different runs of the simulation). Q4. When Chthamalus is excluded from high up in the tidal zone: Many Semibalanus individuals grow well in the Chthamalus exclusion area. Occasional Semibalanus individuals grow in the Chthamalus exclusion area but they tend to die quickly through too much exposure to air. Semibalanus individuals do not grow at all in the exclusion area because they cannot reach and settle there. All of the above are equally likely. Q5. In 1917, biologist A. G. Tansley performed a famous series of studies on two species of bedstraw, a plant that was used to stuff beds. In nature, heath bedstraw grows on peat soil, and slender bedstraw grows on limestone soil. Tansley discovered both species can grow on both thes species is absent. He hypothesized competition explains why, in nature, the two species do not coexist. Which experimental approach would best test his competition hypothesis? A transplantation experiment, where both species are grown together in each soil type, and the number of plants of each species is counted after the duration of the experiment An exclusion experiment, where slender bedstraw is planted in a plot of peat soil, and heath bedstraw is excluded from the plot for the duration of the experiment An exclusion experiment, where heath bedstraw is planted in a plot of limestone soil, and slender bedstraw is excluded from the plot for the duration of the experiment An experiment where peat and limestone soils are mixed together, and both species of bedstraw are planted .

1. Q1. You wish to collect organisms from the lowest part of the intertidal zone in your study area.
To avoid having to swim or dive to collect them, you should time your work to coincide with: A
spring high tide A spring low tide A neap high tide A neap low tide Q2. The graph below shows
one 12-hour spring tide and one 12-hour neap tide. The rock face figure is an example of water
level between high and low. Intertidal organisms will be exposed to the most air if they live
between which tide markings in the graph? A B C D Q3. When Semibalanus is excluded from
below the tidal zone: Many Chthamalus individuals grow well in the Semibalanus exclusion
area. Semibalanus quickly overrun areas above the tidal zone. Chthamalus individuals do not
grow at all in the exclusion area because they cannot reach and settle there. Any of the above are
possible on different rocks (e.g., in different runs of the simulation). Q4. When Chthamalus is
excluded from high up in the tidal zone: Many Semibalanus individuals grow well in the
Chthamalus exclusion area. Occasional Semibalanus individuals grow in the Chthamalus
exclusion area but they tend to die quickly through too much exposure to air. Semibalanus
individuals do not grow at all in the exclusion area because they cannot reach and settle there.
All of the above are equally likely. Q5. In 1917, biologist A. G. Tansley performed a famous
series of studies on two species of bedstraw, a plant that was used to stuff beds. In nature, heath
bedstraw grows on peat soil, and slender bedstraw grows on limestone soil. Tansley discovered
both species can grow on both thes species is absent. He hypothesized competition explains why,
in nature, the two species do not coexist. Which experimental approach would best test his
competition hypothesis? A transplantation experiment, where both species are grown together in
each soil type, and the number of plants of each species is counted after the duration of the
experiment An exclusion experiment, where slender bedstraw is planted in a plot of peat soil,
and heath bedstraw is excluded from the plot for the duration of the experiment An exclusion
experiment, where heath bedstraw is planted in a plot of limestone soil, and slender bedstraw is
excluded from the plot for the duration of the experiment An experiment where peat and
limestone soils are mixed together, and both species of bedstraw are planted