Answer:
The early Earth was very different from our Earth today.
Explanation:
Earth's first atmosphere had lots of water vapor but had almost no oxygen. Later, frequent volcanic eruptions put several different gases into the air (Figure 12.13). These gases created a new type of atmosphere for Earth.
This compressed, slender body shape is beneficial because it allows the fish to easily fit into vertical crevices. This is probably why the fish live on coral reefs and in rocky areas, because there are enough crevices for these fish to fit into.
Answer:
Photosynthesis
Explanation:
The process a plan uses to make food for itself is photosynthesis. And the reverse is cellular respiration.
Answer:
ovum
Explanation:
The ovum is produced from oogonia or ovum 'mother cells' through a process called oogenesis in the ovary. The ovum is not only among the largest cells of the body, it is also specialized to ensure accurate fertilization by exactly one sperm cell.
