Select one: a. The two species of barnacles do not compete with each other because they feed at different times of day. b. Balanus is a predator on Chthamalus. c. Balanus is inferior to Chthamalus in competing for space on rocks lower in the intertidal zone. d. Balanus and Chthamalus have a +/+ relationship. e. The removal of Balanus shows that the realized niche of Chthamalus is smaller than its fundamental niche.

One group of reptiles, characterized by the fossil ark metal x

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation