Based on the fossil record of the Rhynie cherts, what structures were present in the earliest vascular plants? Select all that apply. a. stomata extensive b. root systems c. cuticles multi-veined d. leaves sporangia

Identify characteristics of energy from the sun. check all that apply. almost all of the energy on earth comes from the sun. energy from the sun is known as mechanical energy. the energy in fossil fuels originally came from the sun. plants convert the energy of sunlight into chemical energy.

What are the student's observations and inferences before he starts his investigation?

The serengeti plains are part of the african savanna ecosystem and are home to a variety of different species of plants and animals. the serengeti plains experience a seven-month period of seasonal drought each year, during which the ecosystem receives only four inches of rain and the availability of some resources becomes very scarce. which type of limiting factors does the seasonal drought in the serengeti plains affect?