Evidence for evolution is provided by homologous structures. These are structures shared by related organisms that were inherited from a common ancestor. Other evidence for evolution is provided by analogous structures.
The main function of the nematocyst is prey capture. The correct option among all the options given in the question is option "B". The nematocysts are used by Cnidarians like hydra, jellyfish etc. It is actually a specialized capsule that contains venom and it is used to paralyze and capture small preys for food and also to sting any enemy that comes near.
Answer:
Louis Pasteur effectively disproved the spontaneous generation concept by performing research that displayed exposure to fresh air was the trigger of the microbial growth.
Explanation:
The P wave of the electrocardiogram is considered as a signal from the DEPOLARIZATION of the atria in the heart. This depolarization drives the contraction of the atrial musculature.
An electrocardiogram (ECG) is a device that records the electrical activity of the heart. This record can then be used to diagnose different heart conditions.
The P waves occur when the sinoatrial node generates an action potential which is capable of depolarizing the atria.
This depolarization is then followed by atrial contraction and an increase of the pressure in the atria.
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Answer:
The mutations in a genome similar to printing a book.
Explanation:
Every letter in a book resembles the mutations in the genome. errors that appear in one copy can be copied to all other copies of the book. Like printing errors, mutations always negatively affect the final product. Just as a single book is printed at a time, a single mutation is read at a time. Though mutations are not always negative and can help in the survival of the species when selection pressures change.
