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KIM [24]
3 years ago
11

As a result of global warming, what evolutionary changes could we infer might eventually be seen in polar bears?

Biology
1 answer:
mina [271]3 years ago
4 0

Answer:

Loose of body hair, reduction of body fat percentage and changes in life habits.

Explanation:

One of the most notorious changes would be the loss of body hair, due to the temperature increase. The amount of hair that polar bears now posses, helps them with keeping their body warm in very cold temperatures, as well as the body fat, which would also be reduced because of the excess of heat. Finally, their life habits could also change, as for example, part of the body fat helps them with hibernation, so these periods could be reduced or even lost.

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i believe that the cell will expand because there is less sugar in the water. if you were to add more sugar into the water, then the cell will shrink in size because sugar and salt is the same thing if you add it in water.

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3 years ago
How does the atp adp cycle work
Nataly [62]

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3 years ago
For the numbered steps below, select the option that places them in the correct order. 1) The ribosome binds to the mRNA and use
MrRissso [65]

Answer:

first 4, then 2, then 1, and lastly 3

Explanation:

First, RNA polymerase binds to the promoter region of a gene on the DNA and initiates transcription. Transcription is the process by which we get mRNA (coding RNA) which is used as a template for protein synthesis. Then, in transcription, the resulting mRNA undergoes modification and maturation. This  involves removal of introns, addition of 3'-poly-A tail and 5'-cap. Introns are sequences that do not code for protein and are hence removed. The structure that removes introns is the spliceosome. Thirdly, mature mRNA travels to the cytoplasm. Ribosome (composed of rRNA) binds to mRNA and tRNA to start the process of protein synthesis. The process of formation of protein is called translation. Lastly, the primary structure of protein may undergo folding to form a tertiary structure.

6 0
2 years ago
What is directly responsible for matter moving and changing inside a bear's body?
Firdavs [7]

Answer:

D

Explanation:

4 0
3 years ago
What is psychological aspect of ageing<br>​
Elenna [48]

Answer:

<em />

<em>Explanation: Psychological aging focuses on sensory processes, perception, coordination, mental capacity, human development, personality, and coping ability as they are affected by aging. In most societies, older people are generally viewed as a group of with common characteristics and needs. Older age is usually viewed as a state, a stage or an event.</em>

<em />

<em>Ageing - Physical and Psychological Changes. Pathological Ageing</em>

The process of aging has been around as long as life itself. All living organisms pass through three broad stages from conception to death, which are maturation, maturity and aging. Aging affects everyone because nearly everyone has the potential to grow old and all the societies in which we live have older members (Macdonald, 1997). Gerontology is the use of reason to understand aging. The term was used to refer to the scientific study of aging, but nowadays it includes the study of aging using views from other disciplines such as humanities, social policy and human services. To correctly understand aging, knowledge from a variety of sources is needed, therefore gerontology includes the results of research on aging from all academic disciplines and fields of professional practice. There are four interrelated aspects to the study of aging, which are, physical, psychological, social psychological and social. The study of physical aging examines the causes and consequences of the body’s declining capacity to renew itself and the means for preventing, treating, or compensating for illness or disability caused or related by physical aging (Atchley, 1997). Psychological aging focuses on sensory processes, perception, coordination, mental capacity, human development, personality, and coping ability as they are affected by aging.

<em></em>

In most societies, older people are generally viewed as a group of with common characteristics and needs. Older age is usually viewed as a state, a stage or an event. In reality, older people are not a homogenous group, but rather highly diverse individuals. The factor that is common to all older people is the accumulation of more numerous life experiences over a greater period of time than those of younger people (Bowling & Dieppe, 2005). Aging is defined as the process of becoming older, a process that is genetically determined and environmentally modulated. Aging is something that everyone will have to experience. Everyone will have to grow old. Normal ageing brings about changes in the body and mind, therefore both physical and psychological. These symptoms are all part of ageing, but also some might not be due to normal aging but rather due to diseases, which can be treated or remedied. Therefore, it is important to learn about normal ageing in order to be able to distinguish between disease and normal ageing so to be in a position to seek proper and early treatment for the disease.

<em></em>

Changes related to normal Ageing

<em></em>

Vision

<em></em>

Vision is usually impaired due to ageing. These can be due to presbyopia. There can also be overflow of tears due to blockage of drainage ducts and well as old people may have dry eyes (Chopdar et al., 2003). In order to minimise such problems it is important to check for presbyopia and wear suitable lens. Also it is important to seek a doctor’s advice on the need of any eye drops, only against doctor’s prescription.

<em></em>

Hearing

<em></em>

Due to ageing hearing may be impaired. Hearing loss is common due to old age (Bates, 1993). In order to be able to adjust due to this condition lifestyle modifications may help to overcome this situation. This may include the consideration of hearing aids. Also the installation of loudspeakers to devices such as door bells and telephone units.

<em></em>

Sensation

<em></em>

Sensation also if affected due to normal ageing. Old people have a blunted touch sensation, especially near the tips of the fingers and toes. Also there is a blunted sensation of temperature (Macdonald, 1997). Therefore, in order to counter act these changes, it is important for old people to wear well fitted shoes and take good care of their feet. If any wounds are present these should be inspected regularly. Also it is important to wear suitable clothes according to the day’s weather conditions.

3 0
3 years ago
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