Answer:
The K-T boundary in Zumaia, Spain is sharp--representing an abrupt change in the marine ecosystem.
The K-T boundary separates rock layers of the Cretaceous period from those of the Tertiary period.
The K-T boundary dates to 65 million years ago (when the dinosaurs disappeared)
Explanation:
The Cretaceous-Tertiary (K-T) extinction is the period between the mass extinction of plants and animals about 66million years ago. Based on geological records the interval between the Cretaceous period and the present day Tertiary period is marked by a boundary is called K-T boundary.Based on carbon dating this has been estimated to be 65.5 million years ago.
Evidences has shown that, this boundary must been created by asteroid -Chicxulub Crater and its impacts must have killed all green plants due to the clouds it produced which blocked sunlight penetrations. This decimated the dinosaur population due to lack of photosynthesis.
Answer:
D organelles
Explanation:
Its the actual name for "mini organs" in a cell.
I THINK humid but I'm not completely sure
If the reaction is endothermic, it means that there is a need for heat to be supplied together with the reactants for the reaction to occur. According to Le Chatelier's principle, increasing the temperature of an endothermic reaction will produce more products. Thus, the answer letter B.
<span> concept that all living things were related and that they had changed over time
copy right of development of evolutionary theory</span>