In lakes and ponds there is a whole ecosystem, with its animals and plants. Between them they are in charge of maintaining the entire habitat in favorable conditions for living. The fish tank does not have that cleaning system.
This is when a daughter cell divides into 2 different cells . So basically the dividing of cells to offspring from the parent.
Answer:
In photosynthesis, autotrophs use energy from the sun to convert water from the soil and carbon dioxide from the air into a nutrient called glucose. Glucose is a type of sugar. The glucose gives plants energy.
The late marriage trend in developed countries have affected the late acting lethal alleles in a population because it causes diseased carrying genes in offspring.
Explanation:
The trend of getting married at a late age and starting family after that has been seen in many developed countries especially USA. However, it has a negative impact on the dominant alleles in the population. Marrying at a late age causes genetic disorders or diseases in offspring of humans.
It also causes the chances of having less number of babies. Older parents are more prone to having Huntington’s disease which causes people to have less children.
Answer:
The correct answer is: Electrical impulses in the heart cause the muscles to contract.
Explanation:
The heart contracts thanks to a series of electrical impulses that travel through the muscles of this organ. The electrical impulse begins in the SA (sinoatrial) node and is transmitted to the muscles that conform the left and the right atria to produce their contraction which will make the atria pump the blood to the ventricles. When the electrical impulse reaches the AV node and then the Bundle of His, this information will transmit to both ventricles and will produce their contraction as well.
The only muscle tissue capable of stimulating their own contractions is the muscle in the heart, the myocardium, thanks to the existence of "pacemaker cells" that are located in the SA node.
The waves in the ECG represent the depolarization of the atria, depolarization of the ventricles, and repolarization of the ventricles.
