Answer:
Calcium ions are necessary to activate the binding sites on the actin filaments. The molecule ATP is required each time the myosin head detaches from one site and reattaches to another.
Answer:
horrific.
Explanation:
not only did some people end up running out of food, but they saw their loved ones die from disease, being too cold, malnutrition, the ride was obviously not at all smooth, there could have been massive snow/rain storms. not a good time.
please mark as brainlest.
Answer:
The quarantine can be regarded as an "invisible barrier" that prevents the virus from spreading.
Explanation:
The curve of infections increases when the virus's infection rate in the population greater than 1. The emigration is one of the most important density-dependent limiting factors responsible for increasing the curve of infections, while immigration and the death rate are factors that reduce its maximum value.
Living indicators are species that are sensitive to changes in the environment. For example air pollution can be monitored by looking at lichen, which are sensitive to sulphur dioxide in the air. The number of lichen at a particular location indicates how clear the air is. Similarly, mayfly larvae are good indicators for water pollution because they're sensitive to the concentration of dissolved oxygen in water.
Non-living indicators are things like satellites which can measure the temperature of the sea surface, weather stations that measure atmospheric temperature, rain gauges to measure rainfall, and dissolved oxygen meters to measure concentration of dissolved oxygen in water.
