The small amount of dissolved oxygen found in warm water is considered a to the success of many fish species. a. biotic factor b. limiting factor c. niche d. none of these are correct.

Which of the following sex and generation combinations directly produces the pollen tube of angiosperms? a) male gametophyteb) female gametophytec) male sporophyted) female sporophyte

Food contains a sugar called ( ), which is broken down in a process called cellular ( ). this process uses ( ) to break down food molecules and provide energy for cells. fill in the parentheses

Aflame cell is at the end of each tubule of the nephridium malpighian tubules kidneys none of the above