Answer:
age-graded
Explanation:
Age-graded influences are biological and environmental events that influence the dynamic interaction between an individual and their environment at certain ages of the individual’s course of life. They are events that are expected to occur in a particular setting based on chronological age. For example, depending on the cultural settings of an individual, an individual is expected to graduate high school at a certain age, or get married at a certain age. Another example is puberty and menopause which are biological influences that are age-graded.
The answer is <span>c.CS; US.
In classical conditioning, a new behaviour is learned via association. The stage before conditioning involves: 1. unconditioned stimulus (US) which produces an unconditioned response, and 2. neutral stimulus (NS) which has no effect on a person and produce a response only when paired with </span>unconditioned stimulus. During conditioning, neutral stimulus (NS) and unconditioned stimulus (US) pair and neutral stimulus becomes a conditioned stimulus (CS). In other words, <span>the ns becomes a <u>CS</u> after it reliably signals the impending occurrence of the <u>US</u>. </span>
Answer:
The consumption efficiency of huckleberry is high, like in forest ecosystem.
Explanation:
Huckleberry is a term mainly used to describe numerous variations of plants with different colored small berries. These are a rich source of nutrition for wild bears of Montana.
These plants are residents of acidic and infertile vegetative areas, that is why these species do not grow in Antarctica, central Greenland and parts of the high arctic.
Answer:
by the sarcoplasmic reticulum's calcium ion pumps
Explanation:
Rigor mortis or postmortem rigidity, is a state caused by chemical changes in the muscles that occur post mortem and cause the limbs of the corpse to stiffen.
This occurs because after death, there is no cellular respiration and consequently, no oxygen nor ATP (ATP is required for the muscle relaxation).
Calcium enters the cytosol after death because it is released due to the deterioration of the sarcoplasmic reticulum and due to the breakdown of the sarcolemma. Ca2+ ions activate the formation of actin-myosin cross-bridging necessary for the contraction. Muscles are unable to relax, because myosin heads continue to bind with the active sites of actin and there is no ATP to destabilize the myosin-actin bond.