An ecologist catches 100 frogs from a pond, marks them, and releases them back into the pond. after a few days, another 100 frogs are captured and 10 have the marks on them. how many frogs are in the pond?

What does Earth's crust and uppermost mantle form? A. asthenosphere B. hydrosphere C. lithosphere D. atmosphere Earth's inner core is solid because of A. the composition of its rock. B. its great diameter. C. extreme cold. D. immense pressure.

The scientific method is: a. the use of controlled laboratory experiments to understand the way the world works. b. the dispassionate development and testing of theories about how the world works. c.

A scientist is working with methane and butane which statement best compared these chemicals? A. they are two different types of molecules that each contain the same number of atoms. B.

Which best explains why angiosperms are the most diverse and successful plant group today?

Hich of the following causes the seasons? revolution of moon around earth tilt of earth's axis rotation of earth on axis distance from the sun

Why is it necessary to cool a hot supersaturated solution slowly during a recrystallization?

Name the two energy-equivalent molecules that contain three phosphates as part of their structure. what makes these two molecules different? how many high energy phosphate bonds do they contain? nutrition

During what period of time has the sunbelt region of the u. s. grown most quickly?

The axial skeleton includes the A) vertebra, skull, and ribs B) hip bones, knees, and feet C) shoulder bones, elbows, and hands D) bones of the fingers and toes

After transcription, nuclear RNA is capped, polyadenylated, spliced. After successful splicing, proteins are added to the mature mRNA at the exon junction complex and then transported to the cytoplasm.