Answer:
A. the brain and spinal cord
hope it helps
Answer:
The birds are oviparous in nature and produces eggs that are hatched later by the parent. the egg hatching require proper heat and protection from the external enemy.
The egg shell is the hard covering of the egg of the bird that is made of the calcium. The egg shell protect the egg from the external environment. The calcium layer for the egg shell formation is obtained by the oseteoclast property of the cells.
Answer:
Due to absence of predators.
Explanation:
The populations of invasive species grow rapidly because of the absence of predators that can control its population as as result, it disrupt the whole ecosystem. Change of climatic conditions of the area where they live causes them to migrate from its original place to a new region where the invasive species have no predators to control its population but mostly humans are responsible for the introduction of invasive species. In most cases, the introduction of invasive species happen due to human activities.
Factories and automobiles
Answer:
In order (blanks):
1. Atoms, subatomic, proton, neutron, electron, electron
2. same, different
3. A
4. B
5. Diagram B features compounds, while diagram C features diatomic molecules of an element.
Explanation:
These words and answers may vary depending on your course or teacher, but I tried my best on filling in the blanks for you :)
- and yes, "electron" is indeed filled in twice for number 1.
