Answer:
Hydrogen
Explanation:
2 between A-T and 3 between G-C
Following gastrulation, the next major development in the embryo is neurulation, which occurs during weeks three and four after fertilization. This is a process in which the embryo develops structures that will eventually become the nervous system
the answer is the ratio is off
Ecosystems need producers because they are the start of the food chain.
Producers are consumed by first consumers, the second consumers and so on.