In Study 4, the researchers trapped birds for 10,000 hr per year. Thus, how many insectivo

which of the fol-lowing?

A.0.0

B.0.1

C.0.2

D.0.3

rred to a recipientbacterium?

A.Students 2 and 3

B.Students 2 and 4

C.Students 3 and 4

D.Students 2, 3, and 4

Trials 1 and 3 provide evidence that heat flow depends on which of the following factors?

A.Distance between walls

B.Contact area

C.Temperature of the hotter wall

D.Temperature of the cooler wall

ter wall to a coolerwall is dependent on the:

A.temperature of the hotter wall only.

B.temperature of the cooler wall only.

C.sum of the wall temperatures.

D.difference between the wall temperatures.

ve the tape fromthe plastic wrapping would have been closest to:

A.5.0 N.

B.7.0 N.

C.9.0 N.

D.11.0 N.

t if the asteroidhad not been flattened by the air pressure difference?The asteroid would:

A.not have entered Earth’s atmosphere.

B.have struck another planet in the solar system.

C.have decelerated more gradually.

D.have frozen.

Which of the following variables was controlled in the design of Study2?

A.The number of ants in each site

B.The number of seed dishes placed in each site

C.The mass of the elaiosome of each seed

D.The type of seeds taken by the ants in each site

mage to the forestcaused by the object’s explosion? Energy from theexplosion:

A.traveled rapidly down to Earth’s surface.

B.dissipated in the upper atmosphere.

C.was released less than 1km above Earth’s surface.

D.was released as the object struck Earth’s surface.

e sufficientlyheated, they change to:

A.solids.

B.gases.

C.liquids.

D.a vacuum.

undwater table about 3 m below the surface. Based on Figure 3, and assuming no alteration of the precipitation, the δ18O value of present-day precipitation in the study area is closest to:

A.-26.

B.-23.

C.-20.

D.-15.