Afern is an example of a plant the expirences alternation of generation in it's life cycle. which statement accuratly describes this type of life cycle?

a. a cell division generation alternates with a pollen forming generation

b. a gametophyte generation is enclosed within a sporophyte generation

c. a cell division generation alternates with a flower forming generation

d. a gametophyte generation alternates with a sporophyte generation

Asap timed! 1. ice core samples from glaciers ice caps contain bubbles of ancient atmosphere that are in layers based on age. what questions are scientists most interested in? a. how the amount of water vapor needed to make the ice has changed b. how the amount of ozone has changed over time.c. how the amount of ice in each layer has changed over time d. how the amount of carbon dioxide has changed over time 2. what produces milankovich cycles ? a. sunspots ams solar flare on the suns surface b. changes in the earths orbit c. gravitational changes bases on the position of the sun and the moond. cycles of vegetation that result in desert and rainforest conditions

How many years would it take the atlantic ocean to grow 500 centimeters? show your work.

Photosynthesis uses co2 and cellular respiration produces co2. we call the point when the two processes are in balance--when there is no net production of co2--the compensation point. how might you limit one of the processes in order to achieve a compensation point?