Answer:
(2) low power: 100 small pollen grains
high power: 25 large pollen grains
Explanation:
Compound light microscopes are devices used to greatly magnify objects. They have several objective lenses, a low-power lens magnifies 10 times (10X) the objects, and the high-power lens magnifies them 40 times (40X).
For that reason, when observing the pollen grains with the high-power lens the student will see them bigger than with the low-power lens. However, the field of view (the visible area through a lens) is reduced when a higher power lens is used, so fewer pollen grains will be seen.
The answer therefore is the option of higher number of pollen grains of small size for the low-power lens, and lower number of pollen grains of larger size for the high-power lens.
Answer:
The search time is inversely proportional to prey density
Explanation:
Optimal foraging theory is a model used to predict animal behavior during the search of food, which is a critical process that requires the consumption of energy and time. In order to increase its fitness value, animals acquire foraging skills that help to obtain higher energy rates for the lowest cost. Thus, the optimal foraging model enables the prediction of the optimal strategy that allows to maximize the gain of energy during a particular time interval. The critical search time indicates the time that a consumer needs to add additional prey to its menu. In this model, a consumer will be converted to a 'generalist' and will add a second prey to its menu when the search time for the preferred prey is higher to the energy-time coefficient to obtain such prey.
You have to remember that a scientific hypothesis is a question about whether or not something will happen the way you think it will.
When under the influence of alcohol, muscle COORDINATION is slow and errors are made in interpreting speed. Muscle coordination refers to the complex coordinated movement of muscles with little conscious efforts. This ability is always drastically reduced in individuals who are driving after taking alcohol.