A biologist began studying a population of bullfrogs. In 1998, she found that most of the male frogs croaked, but some did not. A bat species know to prey on male frogs migrated to the area in 2005. The biologist returned to the area in 2008 and repeated population counts of male frogs. The table shows her data. Based on the data, which statement is a plausible explanation for the change in the frog population between 2004 and 2008?

Elephants in the savanna regions of africa dig holes in dried up river beds to reach water lying just below the surface. these holes provide drinking water for other animals as well. so, without the elephants, many animals might otherwise die from lack of water during the dry season. the location in which the elephants live is an example of a/n and the role they play in creating water holes is an example of a a) ecosystem; habitat b) community; niche c) habitat; niche d) niche; habitat

What type of plant is good for a bioassay and where can i buy it? i only have a month.

During the process of blank and molecules such as a glucose must use a protein channel to cross through a cell membrane