There are three types of adaptations. ____ are body structures that allow an animal to find and consume food, defend itself, and to reproduce its species. ____ is something an animal does usually in response to some type of external stimulus in order to survive. Examples includes, ____ - the drawing of milk into the mouth from the nipple or teat of a mammary gland, ____ - A behavioral response of a cell or an organism to an external stimulus, which may either be towards (attraction) or away (repulsion) from the source of stimulation. If the response is towards light then it is called ____ if it towards chemicals it is called ____. ____ - is an adaptive response to the seasonal or geographic variation of resources. ____ - behavior that some animals do by hiding in humid burrows to avoid the extreme rising of the temperature in the summer. ____ - behavioral adaptation whose function is to maximize energy efficiency in animals during winter season. ____ - a psychological learning process wherein there is a decrease in response to a stimulus after being repeatedly exposed to it. ____ - a form of learning in which a very young animal fixes its attention on the first object with which it has visual, auditory, or tactile experience and thereafter follows that object. ____ - learning that occurs when a neutral stimulus (e.g., a tone) becomes associated with a stimulus (e.g., food) that naturally produces a behavior. Examples of structural adaptations includes ____ a form of feeding, ____ energy production, ____ for movement and ____ for removal of waste mechanisms, ____ for blending in the environment, movement to search for food and safety, ____ a protection against predators and paralyzing the prey. The last category of adaptation is ____ that deals with peculiarity of the procreative mechanism of a species that results in it being better fitted to its environment. Examples includes; ____ – that have a very hard protective outer coats to withstand harsh conditions like fire and drought, ____ - that have increased thickness of the walls that are dispersed. ____ – more efficient nutrition with spongy structure that passes oxygen, nutrients, and other useful substances from the mother to the fetus. When sunlight reaches the earth’s surface, it can either be ____ into space or ____ by the earth. ____ that is absorbed by the earth warms the planet. Once absorbed, the planet releases some back into the atmosphere as heat (also called ____). Solar energy that is reflected back to space does not warm the earth. Certain gases in the atmosphere ____, slowing or preventing the loss of heat to space. Those gases are known as “greenhouse gases.” They act like a ____, making the earth ____ than it would otherwise be. This process, commonly known as the “____,” is natural and necessary to support life. However, the recent buildup of greenhouse gases in the atmosphere from ____ has changed the earth's climate and resulted in dangerous effects to human health and welfare and to ecosystems. Examples of green houses gases include ____ used in photosynthesis, ____ also called natural gas, ____ or steam and ____ which is also called the laughing gas. The increased temperatures leads to long-term shifts in temperatures and weather patterns. This leads to accelerated rise in ____ due to melting of ____ and snow from the north and south poles.

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