In the military, night vision goggles are used to pull off secret missions into areas that are very dangerous. for this reason, the soldiers try to infiltrate at night so they can't be seen. thermal-imaging devices are often used as well to locate people on these highly secretive missions. what type of electromagnetic radiation is being utilized? a) radio waves b) gamma rays c) ultraviolet rays d) infrared waves

The correct option is D-Infrared waves

Infrared waves are being used in thermal imaging devices. Thermal imaging is basically a method that is used to enhance and improve objects visibility in dark environments. The image of any object is created by the detection of infrared radiations coming out of that object and then an image is created based on the received information. Thermal imaging does works in environments without any ambient lights and can penetrate obscurants like fog and haze.

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium of the heart. as the ventricle contracts, blood leaves the heart through the pulmonic valve, into the pulmonary artery and to the lungs where it is oxygenated.