Answer:
tundra
Explanation:
Obviously not: tropical, rainforest, rainforest temperate, and savanna.
Answer:
pulmonary vein
Explanation:
The pulmonary veins
transfer oxygenated blood from the lungs to the heart.
It helps complete the pulmonary circuit, by receiving oxygenated blood in the alveoli and returning it to the left atrium.
A- non-native species can have positive and negative affects
The atria and ventricles work together, alternately contracting and relaxing to pump blood through your heart. ... The electrical activity spreads through the walls of the atria and causes them to contract. This forces blood into the ventricles. The SA node sets the rate and rhythm of your heartbeat.
Answer:
On structure
Explanation:
Robert Whittaker classified the organisms in a broader sense based on many characteristics which could be the limitations of the previous system of classification.
The Whittaker classified the organisms into five large kingdoms called monera, protist, fungi, plants and animals. The basis for this classification is the cell occurrence, their mode of nutrition and cell structure.
In the given question, since the only structure of cell option is provided therefore will be the correct option.
Thus, On structure is correct.
