input with options: Answer the following question given this paragraph: Unlike energy, matter doesn't need to be constantly added to ecosystems. Instead, matter is recycled through ecosystems. Water and elements such as carbon and nitrogen that living things need are used over and over again. Q: Unlike energy, what doesn't need to be constantly added to ecosystems because it is recycled through ecosystems? A:
OPTIONS:
- water
- nutrients
- vapor
- matter
output: matter

Q: Answer the following question given this paragraph: 45.3 Environmental Limits to Population Growth Populations with unlimited resources grow exponentially, with an accelerating growth rate. When resources become limiting, populations follow a logistic growth curve. The population of a species will level off at the carrying capacity of its environment. Q: While populations with unlimited resources grow exponentially, the population of a species will level off when what limit of its environment is reached? A:

OPTIONS:
- reproduction
- niche
- extinction
- carrying capacity

A: carrying capacity

input: OPTIONS:
- microscopic
- circular
- oblong
- angular Now, answer this question: Answer the following question given this paragraph: The wide range of movement allowed by synovial joints produces different types of movements. Angular movements are produced when the angle between the bones of a joint changes. Flexion, or bending, occurs when the angle between the bones decreases. Moving the forearm upward at the elbow is an example of flexion. Extension is the opposite of flexion in that the angle between the bones of a joint increases. Rotational movement is the movement of a bone as it rotates around its own longitudinal axis. Movement of the head as in saying "no" is an example of rotation. Q: What type of movements are produced when the angle between the bones of a joint changes? A:
A:
output: angular

Answer the following question given this paragraph: Low levels of estrogens and progesterone are also associated with some disease states, such as osteoporosis, atherosclerosis, and hyperlipidemia, or abnormal blood lipid levels. Testosterone levels also decline with age, a condition called andropause (or viropause); however, this decline is much less dramatic than the decline of estrogens in women, and much more gradual, rarely affecting sperm production until very old age. Although this means that males maintain their ability to father children for decades longer than females, the quantity, quality, and motility of their sperm is often reduced. As the body ages, the thyroid gland produces less of the thyroid hormones, causing a gradual decrease in the basal metabolic rate. The lower metabolic rate reduces the production of body heat and increases levels of body fat. Parathyroid hormones, on the other hand, increase with age. This may be because of reduced dietary calcium levels, causing a compensatory increase in parathyroid hormone. However, increased parathyroid hormone levels combined with decreased levels of calcitonin (and estrogens in women) can lead to osteoporosis as PTH stimulates demineralization of bones to increase blood calcium levels. Notice that osteoporosis is common in both elderly males and females. Increasing age also affects glucose metabolism, as blood glucose levels spike more rapidly and take longer to return to normal in the elderly. In addition, increasing glucose intolerance may occur because of a gradual decline in cellular insulin sensitivity. Almost 27 percent of Americans aged 65 and older have diabetes. Q: How do parathyroid hormones react as a body ages? A:

OPTIONS:
- use with age
- decrease with age
- help with age
- increase with age

Answer: increase with age

Problem: OPTIONS:
- square
- one-dimensional
- diamond
- three-dimensional
Q: Answer the following question given this paragraph: Q: The differing glycosidic linkages in starch and cellulose give the two molecules what kind of distinct shapes? A:
Answer: three-dimensional

Answer the following question given this paragraph: Q: What forms when water in the atmosphere condenses on dust particles suspended in the air? A:

OPTIONS:
- hail
- snow
- wind
- clouds

Answer:
clouds