A marsh supports a large population of cattails, which are tall wetland plants. Purple loosestrife, an invasive wetland plant, is introduced to the marsh. Both purple loosestrife and cattails require access to sunlight and space along the floor of the marsh to grow. What effect will the growth of purple loosestrife have on the marsh's carrying capacity for cattails?

The table below shows the number of foot bones in some horse fossils.horse fossil recordhorse fossil number of foot bonesp 19q 17r 24s 13ancient horses had more bones in their foot then present-day horses. the present-day horse has 11 foot bones. what is the correct order of evolution of the horse starting from the youngest fossil? a. q p r s b. s r p q c. s q p r d. r p q s

Transmission electron microscope are best for viewing a) microorganisms in pond water b) internal organs of a mouse c)internal structures of a cell d) surface features of a specimen

In the diagram below, the northern hemisphere would be in what season at position a a.fall b. winter c.summer d.spring