Most fish have fins that are?

a. horizontal

c. paired

b. lobed

d. all of the above

Scuba divers often visit a coral reef off the coast of South Central America. There has been a great increase in tourism and diving in this area. Which best describes the effect this will have on the reef.

Natural features of Niagara falls

What do sexual reproduction and asexual reproduction have in common?

Fine, wet crackling sounds usually caused by closed alveoli popping open when enough air pressure is applied. Fluid in the lungs squeezes alveoli closed, making them unavailable for gas exchange until they can be forced open A) True B) False

Which of the following statements is false? Select one: a. Estrogen causes endometrial cells to proliferate. b. After ovulation, the endometrium becomes thicker. c. Rising progesterone levels cause the myometrium to contract. d.

Which river is associated with the settlement of ancient egypt? question 2 options: tigris ganges nile yellow

What is a binomial nomenclature? a two word system for naming organisms by using the genus and species a two word system for naming organisms by using the family and genus a two word system for naming organisms by using the order and family a two

Excess of which vitamin can cause toxic effects of excess perspiration and fishy body odor

Many children were paralyzed by polio in the 1950s. Today, polio has been reduced by 99 percent. Which statement best explains how this disease has been almost eradicated?

When looking at biodiversity threats, how do invasive species rate, wat is the higest threat to biodiversity