Because DNA must have guanine to balance it out, without guanine the percent of adenine would increase.
Answer:
<u>Animals and plants use oxygen for processing cellular respiration.</u>
Explanation:
Most of all organisms use oxygen to undergo cellular respiration with the help of the mitochondria that powers energy. Cellular respiration is needed to obtain energy for survival. As products of cellular respiration, ATP energy is created, and carbon dioxide + water is released from the organism. Thus, an ecosystem like a rainforest with animals and plants use oxygen for processing cellular respiration.
Answer: Keystone species
Explanation:
A keystone species is the species on which other species of the ecosystem depends on. The keystone species can be a predator or prey. It maintains the balance of the population of other species in an ecosystem.
This is false. Green algae consist of the Chlorophytes and Charophyte/Streptophyta. Land plants are classified as embryophytes and are thought to have evolved from the charophytes.
