What event starts an action?

A: Habit

B:Trial and Error

C:Response

D:Reflex

E:Stimulus

I have more questions that I will put in comments.

3. What is the function of the petals in regards to sexual reproduction? a. It collects the pollen c. it attracts pollinators b. It protects the stigma d. it produces ovules

How do scientists use DNA to study the origins of humans? a. Cloning b. Examining the number of chromosomes in populations c. Looking at the genetic markers in different populations

Explain how changes in land use can impact an ecosystem.

What are cnidoblast? list the functions?

Researching the Circulatory System also called the Cardiovascular System. List the organs found in this system Explain the functions of this system What other systems of the body does the circulatory system interact with?

The three structural components of the modal model of memory are:

Which book is considered the catalyst of the modern environmental movement?

By which process are CO2 and H2O converted to carbohydrates?

T/F Metamorphic rocks are formed by a combination of heat, pressure, or hot fluids acting on an igneous, sedimentary or other metamorphic rock.

Which organism in the above pyramid has the least available energy