The largest mass extinction was in the

a.

Precambrian time.

c.

Paleozoic era.

b.

Cenozoic era.

d.

Mesozoic era.

What determines the color of an opaque object?

If a 10. m3 volume of air (acting as an ideal gas) is at a pressure of 760 mm

What reactions is the electron transport chain in etc

What is an nonconformity?

You are treating a short of breath 9-year-old male with a history of asthma. on scene he presents in severe respiratory distress with noted intercostal retraction, lethargy, and expiratory wheezing. his pulse is 136, respirations 32, and spo2 95%.

Are microorganisms alive and do microorganisms affect humans

Which statement best describes the process of chemiosmosis and the direct result of its occurrence? A. The choices are Hydrogen ions flow from the thylakoid down a concentration gradient through ATP synthase channels into the stroma.

Describe how human activities threaten polar bears in the arctic

What did Mendel cross pollination of pea plants prove

Which type of rock is created when lava cools and hardens? A. igneous B. sedimentary C. metamorphic D. cement