Which organism has a central ganglia in its head connected to a ladder-like arrangements of nerve fibers.

A. Spider

B. Seahorse

C. Frog

D. Flatworm

What is overcrowding in biology?

The denser an object, the more compact it is. The table below shows the mass and volume of two different objects. Comparison of Liquids Liquid Mass (g) Volume (cm3) X 72 12 Y 63 9 Which of the two objects is more compact? Object X is more compact.

A glacier melts and retreats a layer of bed rock is exposed which term best describes the process that establishes a community on the bed rock? A. Disturbance B. Stabilization C. Succession D. Weathering

On a windy day, you observe the wind carrying away exposed seeds of a tree. Which would be losing its seeds? a. Pterophyta b. Angiosperms c. Gymnosperms

Differentiate between reflex action and walking

How do scientists obtain knowledge about the world? Check all that apply.

What would the temperature of the surface be if the Earth did not have an atmosphere?

How would the lack of water affect cellular respiration?

Different types of normal tissues in the human body have different mitotic indices. From the following list, which normal tissues would you expect to have the highest mitotic index: muscle, skin, kidney, or lung? Explain your answer.

A group of scientists decided to post their research results on the Internet instead of publishing in a scientific journal. What part of the scientific process have they skipped and why does it matter?