Answer:
b. typify a population in which all ages have an equal chance of surviving. → YES
e. are typical of annual plants → YES
Explanation:
Different species have survival curves differently shaped. In general terms, there are three different survival curves.
- Type I. Mortality often occurs at the end of the cycle, representing species with low mortality. Organisms exhibiting this type of survivorship curve have long cycles of life and high probabilities to survive until they are old enough. These species have few descendants and spend too much time and energy in parental care to ensure their reproductive success.
- Type II. The probabilities of dying are equals all along the cycle, at any age interval. The number of dead individuals remains constant from the beginning to the end of the life cycle. These species have reduced offsprings, and they ensure their reproductive success by providing some significant parental care.
- Type III. Significant mortality during the early stages of life. Only a few individuals reach the later life stages, getting to survive their first period of life. Survivors usually have a long life. These species produce big offsprings at the same time, but they provide little or no parental care. Their reproductive success relies on the number of descendants.
Type II survivorship curves:
a. are characteristic of humans and elephants → No, this is Type I curve
b. typify a population in which all ages have an equal chance of surviving. → YES
c. indicate a high mortality rate in the very young. → No, this is Type III curve
d. show that very few young are produced, that each is given parental support, and that most individuals live a relatively long life and die of old age. → No, this is Type I curve
e. are typical of annual plants → YES
Tropopause is the boundary between the troposphere and stratosphere.
Explanation:
- Tropopause marks the transition region between troposphere and stratosphere.
- As we move up from the Earths surface , the temperature gets colder but when we reach the tropopause the temperature becomes constant and the temperature does not fall further.
- It is at a height of about 9Km at the polar region while at a height of 17 Km at the equitorial region.
<u>Answer</u>:
1. The purpose of the uninoculated control tubes used in the oxidation fermentation test is to serve as basis of the medium for the color comparison and that it is sterile.
2. It is necessary to use two controls in order to illustrate the no color change (green color) under both aerobic and anaerobic conditions.
3. The purpose of the experiment is to determine if the organisms utilize the carbohydrate and thus is fermentative. This will result in a color change from green to yellow.
Thus, the medium in one tube is sealed with a layer of paraffin to prevent diffusion of oxygen. This tube will show that the medium is unaffected by the lack of oxygen.
The second tube will allow the diffusion of oxygen. This tube will show that the medium does not change color naturally in the presence of oxygen. Thus, the color changes will be caused only by the fermentation process of the organisms.
I believe the correct answer is North America. .
please vote my Answer brainliest. thanks!
<span>It depends on motor proteins and micro-tubules. Motor proteins are proteins that transform chemical energy into mechanical energy which helps cell movement and they also move along a surface. Micro-tubules are also proteins and they are structural components of the cytoskeleton. They are used as structures for movement with the vesicles .</span>
