Which substance acts as a buffer in natural water?

A) minerals and salt

B) distilled water

C) sulfuric acid

D) a pH indicator

Conception is the moment a sperm meets an egg resulting in pregnancy. a. True b. False

Charles darwin is best know for developing his theory of evolution based on his observation of what characteristic? a. the beaks of finches b. the scales of snakes c. the necks of giraffes d. the trunks of elephants

What is the series of events that cells go through as they grow and divide?

Which process is most critical for different types of tree cells to develop A) mitosis B) cell differentiation C) sexual reproduction D) DNA replication

The concentration of h ions inside the mitochondrial matrix is lower than it is in the cytosol or the mitochondrial intermembrane space. what would be the immediate effect of a membrane-permeable compound that carries and releases protons

How would the introduction of a nonnative species most likely affect biodiversity in an ecosystem? a. The nonnative species would decrease biodiversity. b. The nonnative species would increase biodiversity. c.

Which gas is most abundant in earth's atomsphere

In which of the following types of bone is blood production most likely to occur

What happens to a carbon atom transitioning between photosynthesis and respiration?

Which environment change is likely to allow the most individuals to survive A. Transition from a meadow to a forest B. Massive volcanic eruption C. Oil spill in the bay D. Acres - wide forest fire