Oncogenes are the abnormal cells that divide and create another abnormal cells. When abnormal cell division occurs, tumor may be developed. <span>When a tumor is considered cancerous, it is called. malignant. Benignant on the other hand is the tumor that it's not dangerous and not cancerous.</span>
Ammonoids are good as index fossils because of the following characteristics;
<span>1.
</span>Their abundance and vast distribution across most shallow
marine waters during the periods
<span>2.
</span>They have easily recognizable
features, such as shells and the highly crenulated and complex suture, that are well preserved in rocks
<span>3.
</span>Their rapid
evolution that can assist determine changes and variations in the then environment
Answer:
c a b
Explanation:
they go from having legs and a jaw,then no legs and jaw,finally to no jaw
Can you give more details? do you have a screenshot you can send?
Answer:
yes
Explanation:
A chemical compound is considered to be a pure substance. This is because each molecule of the chemical compound has the same chemical formula.
