Suppose a dog shows a play face to another dog to indicate that the behavior that follows is not aggressive, but playful. which type of signal would this be?

If you scratch a mineral sample with your fingernail, a knife blade, or glass, what property are you testing? luster streak acid effervescence hardness

What does the study of ecosystems consist of?

Griffith, in his 1928 experiments, demonstrated that bacterial strains could be genetically transformed. The evidence that DNA was the "transforming principle" responsible for this phenomenon came later.

What do you think is an advantage of a close circulatory system?

List cell organelles that are never found in prokaryotic cells

Which of the following is the definition of macrophage

The process that removes metabolic waste products from an organism is known as

Some organelles found in modern eukaryotic cells may be the result of a symbiotic relationship between ancient prokaryotes. Which organelles may have once been prokaryotes? a. mitochondria and endoplasmic reticulum c. mitochondria and ribosomes b.

illustrate the diffusion of molecules from high concentration to low concentration.

Explain the human impact on the greenhouse effect