Radioactive decay of carbon 14 years since death c14 atoms remaining per 1.0 x 108 c12 atoms 0 10,000 5,700 5,000 11,400 2,500 17,100 1,250 22,800 625 28,500 312 34,200 156 39,900 78 45,600 30 51,300 20 57,000 10 62,700 5 68,400 2 how old is a bone in which the carbon-14 in it has undergone 3 half-lives? a. 11,400 b.17,100 c. 34,200 d. 57,000 hurry i have a test

For a to be healthy, it has to have lots of different kinds of plants and animals. all of the different types of plants and animals in an ecosystem. name four types of ecosystems from those listed in the video. b) c) d) most living things live here. all living things depend on how an ecosystem like a game of sticks? why should we build new buildings on existing land? name four extinct species from those listed in the video. b) c) d) the best way to wipe out a species is to the largest ecosystem in the world is this percent of the world is covered by water. how many of all species in the world live in the ocean? list five things you can do to increase biodiversity. b) c) d) e) how many species are we losing per hour?

What are the doorways into and out of cells, attached to the membrane, and built in the rough er.

Suppose you have monohybrid pea plants in your garden and find that they produce round seed to wrinkled seeds in the ratio of 3: 1. if the allele are designated (r & r) receptively. what is the probable genotypes of the round seeds which produced f 1 ? rr & rr rr only rr & rr rr only rr only