What important role does lignin play in vascular plants?

The forelimb structure seen in both bat wings and human arms is very similar to that of an extinct land animal called eusthenopteron. This fact suggests that

Gregor Mendel studied pea plants to determine the patterns of inheritance. What is not a reason Mendel used pea plants in his experiments? Check all that apply

A researcher designs an experiment to determine if German Shepherds prefer pet doors that opens from the side or from the top. He installs two pet doors side-by-side in the same wall.

Can someone check my answer? Which statement best supports the fact that natural selection occurs in the marine environment? Few marine organisms survive when the ocean environment is unstable.

What is the relationship between structure and function in the selected muscle? - Muscle - Human Cardiac - Smooth Muscle - Skeletal Muscle

Humans do not eat the algae directly from the ocean, so how can we still be affected by it?

In an effort to control the ongoing cholera epidemic affecting Haiti, health officials are considering the use of cholera vaccines. One difficulty they are facing is the limited vaccine supply.

which term refers to the structure that forms the surface of a cell separeting its conctents from the outside world

Who explored Texas, New Mexico, and Arizona in 1528, while lost for nine years? A) Hernando de Soto B) Francisco Vasquez de Coronado C) Cabeza de Vaca D) Juan Ponce de Leon

The part of the livestock female reproductive system that is between the infundibulum and the uterus and is also called the fallopian tube is the: