A team of scientists discovers a fossil of an ancient plant species. They report that the plant developed from an embryo and had vascular tissues, but it did not have seeds. The ancient plant might have been an ancestor of which set of plants? a. mosses only
b. ferns only
c. mosses or ferns only
d. ferns, cone-bearing plants, or flowering plants

humans can cause extinction of a species through overharvesting, pollution, habitat destruction, introduction of invasive species (such as new predators and food competitors), overhunting, and other influences. explosive, unsustainable human population growth is an essential cause of the extinction crisis.

explanation:

i didn't have the answer choices , but i tried my best.

the answer is b)3/8x+1

1. loamy sand is about 80% sand with 10% clay and defined mostly by sand particles with some clay to provide structure and fertility. the sand particles are easily visible and the soil holds structure but breaks apart easily.

2. scott sand can improve his soil quality by incorporating more silt and organic matter into the soil. peat moss and organic matter can also be incorporated.