Why is it a problem when plants or animals become endangered or extinct

What type of organism does a bacteriophage attack

An ecosystem has experienced a recent decrease in its plant populations. Which of the following is a possible reason for the decline? a. an increase in the number of predators b. a decrease in the number of prey c.

if there is a low concentration of sucrose to water (so there's more water than sugar in a solution) outside of a cell, will the cell shrink or expand? and why (using osmosis to explain) ?

Which is hotter, 30°c or 30°f? How do you know?

What did Kennedy believe the government could do to solve the problem? poverty abroad

How many growing seasons do plants with herbaceous stems usually survive?

What is one advantage of having many small cells instead of one large cell? A. small cells do not have cell membranes B. with many small, cells you have more surface area C. small cells do not require a stable internal environment D.

What are some of the effects of the enhanced greenhouse effect?

Which statement correctly describes an interaction of the respiratory and circulatory systems? A. Breathing speeds up when heart rate slows down. B. Breathing and heart rate slow down during exercise. C.

How man cells do spermatogenesi produce from one original cell