A physical environment with different species that interact with one another and with nonliving things is called

How is thermal energy within the earths layers of related to some of its natural disasters

Acanthostega is an extinct amphibian. Fossils indicate that it had four limbs, lungs, gills, and a tail used to propel itself through water. Why are Acanthostega fossils considered transitional fossils? A.

Many drugs used during surgery can interfere with the urination process. in these cases, the excretory system is not damaged, but the correct signals are not being sent to activate it. what system is most likely malfunctioning?

During the replication of DNA, where are bonds broken?

Some steps in cell division are shown below: 1. Daughter cells are created with 46 chromosomes each 2. Chromatids cross over and exchange sections of DNA 3. Number of chromosomes is reduced to half 4.

Siamese cats have dark fur on their face, ears, legs and tail. On the core of their bodies they have lighter colored fur. The color of the fur is determined by an enzyme. On the cooler parts of the body the enzyme causes darker fur.

Which organs perform both mechanical digestion and chemical digestion of food?

What animals can eat chocolate

What do cells have in common

Summarize the similarities and differences of Prophase and Telophase.