The spiny “leaves” on a cactus plant are an example of a adaptation.
a. predator
b. prey
c. mutualism
d. commensalism

Answer is a. Predator

Most of the cactus have spines. The spines are modified leaves which minimize the surface area and so reduce water loss by transpiration. The spines also protect the cacti from predators such as desert grazing animals that might eat them.

the cost of mining is extremely low compared to the money earned from mining, creating income to improve the environment.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set