Which derived character is shared by fish and frogs but not lancelets? A. hair B. four-legged locomotion C. amniotic eggs D. vertebral column

What are the cause. s of monocultures, loss of topsoil. alien species

What is the name of respiration that occurs in the presence of oxygen?

The nurse working in a pediatric clinic is preparing to administer childhood vaccinations to a 15-month-old child. which vaccine should be added to the child's routine immunizations at this time because the child is older than 12 months of age

What is a form of carbon found in the atmosphere?

Describe a key stone species.

What are two different habitats in a prairie ecosystem and name one organism found in each habitat.

Which level on the energy pyramid has the third most energy? A. primary producers B. primary consumers C. secondary consumers D. tertiary consumers

How do pH affect the stability of double-stranded nucleic acid?

What is the first step in the scientific process

Why is DDT so hazardous? A:it does not decompose fast B:it killed almost everything C: it traveled to many continents through water