Answer:
Today, most scientists believe instinct is more important than environment in animal behavior is false, so that's the answer. Enjoy.
But roughly 2.45 billion years ago, the isotopic ratio of sulfur transformed, indicating that for the first time oxygen was becoming a significant component of Earth's atmosphere, according to a <span>2000 paper in Science</span>. At roughly the same time (and for eons thereafter), oxidized iron began to appear in ancient soils and bands of iron were deposited on the seafloor, a product of reactions with oxygen in the seawater."What it looks like is that oxygen was first produced somewhere around 2.7 billion to 2.8 billon years ago."It looks as if there's a significant time interval between the appearance of oxygen-producing organisms and the actual oxygenation of the atmosphere."
Answer:
A. Out of the cell. They want to move from high to low concentration (DOWN the concentration gradient)
Explanation:
Although the cuticle provides important protection from excessive water loss, leaves cannot be impervious because they must also allow carbon dioxide in (to be used in photosynthesis), and oxygen out. These gases move into and out of the leaf through openings on the underside called stomata (Figure 3b).
For the answer to the question above, the best stage in fern life cycle is the sporophyte stage. It is the <span>multicellular diploid stage in the life cycle of a plant or <span>algae</span></span>.<span> Developing from the zygote produced when a haploid egg cell is fertilized by a haploid sperm and each sporophyte cell, therefore, has a double set of chromosomes, one set from each of its parentchromosomes.</span>
