It’s length and sequence of nitrogen bases
They're called anastomoses
Horizontal lines, like the horizon. That's how I remember it, anyways. Or on a globe, latitude lines. My teacher always taught us "FAT-itude lines."
The right option is; carrying capacity
The carrying capacity is the maximum number of organisms that can be supported in a specific area within limited natural resource such as food, habitat, and water. The carrying capacity for any environment is not fixed and it can be influenced by certain factors such as water and food availability, and environmental conditions.