Answer:
The correct answer will be option A.
Explanation:
The electrical impulses are generated in the sino-atrial node or SA node, a mass of cells which generates impulse in the upper atrium.
This electrical impulse transmits from the sino-atrial node to the atrio-ventricular node in the lower portion of the upper atrium through the internodal pathway- the pathway composed of atrial cells.
Once the impulse reaches the AV node, it is transferred to the ventricular portion of the heart through Bundle of His presence in the ventricular septum. This bundle of his divides into left and right ventricles through bundle branches and stimulates both the ventricles.
Thus, option-A is the correct answer.
Answer:
Since they need to float, leaves on the surface of plants are flat. 6. The presence of air sacs enables them to float. Their roots are smaller so water can spread freely and directly into the leaves
Grana (plural) are stacks of flattened sacs
It's granum if it's singular
And those flattened sacs are called thylakoids, which contain chlorophyll
The mode of nutrition described above is phagocytosis.
Amooba is a unicellular eukaryotes and it obtains its nutrition using the same method. Amoeba feeds on microscopic organisms, which it engulfs, secretes into its food vacuole and digest.
Answer:
between meiosis 1 and meiosis 2 is Anaphase 1.
Explanation:
