Planarians have a branched digestive tract with both a mouth and an anus.

a. True

b. False

In previous chapters, you learned about osmotic and diffusion gradients that aid in maintaining water and ion balance and in developing resting potentials in cells, among other important biological features.

Regarding fluid shifts and dehydration, when adh secretion increases to regulate sodium balance by means of increased water retention without additional water consumption (i. e.

Vaccines play an important role in the ability of the body to resist certain diseases. Explain how a vaccination results in the long term ability of the body to resist a disease

Which system drecribes the action of natural selection

Cell division is triggered when cells reach a certain size because

Why do you think scouts could hear better through the solid ground rather than through the air?

What is an aftershock

The Hawaiian honeycreeper has a highly evolved, mutualistic relationship with the Hawaiian silversword, a native plant that grows on beach front cliffs and dunes.

Which of the following components of the blood contains antibodies? A. red cells B. white cells C. platelets D. plasma class - forensic science

Why do the atoms in the top rows in the Periodic Table have higher electronegativity than atoms in lower rows? The electrons of those atoms are farther from the nucleus. The electrons of those atoms are closer to the nucleus.