Question 1 The world's population is spread very unevenly. Some spaces are empty or very sparsely populated: we speak of human deserts:
• Cold polar environments are the least populated regions: the ground, frozen permanently, prevents any form of agriculture, the very low temperatures make the habitat difficult.
• The hot or cold desert environments are also not busy: the lack of rain and the strong heat during the day limit the activities of men. The only exceptions are oases.
• The role of relief is more difficult to define. High temperate mountains like the Alps are generally sparsely populated but tropical chains like the Andes have a high population density. However, men have generally settled in the plains, in the valleys (along with the rivers) and on the coasts.
There are also other factors unrelated to land factors that influence population density such as job availability, or even historical factors.
Question 2: Birth rate:
The birth rate (sometimes called the crude birth rate) is the ratio of the annual number of births to the average total population for that year. When the population grows, the contact between people will be more permanent, and it will increase the marriage rate, and thus the birth rate. Age structure:The age structure is a mode of graphical representation of the structure (of age as well as of sex) of a population which constitutes a synthetic image of the past, present and future of the population.When a population resides for a long time in the same place (in favorable conditions, not raising the death rate and without moving), this will vary the age structure by observing an increase in the elderly population.
Meta-population is the patchiness of population in space and its role is dynamic, population insatiability, coexistence of species, the maintenance of diversity.
Metapopulation is colonization and extinction dynamics. The variable of prime concern is the proportion.As the population largest approaches the environment carrying resources become more scare and growth rate slows.
The m maxima carrying number of species in environment can support indefinitely .A group of spatially separated population of similar organism which interact at some levels.It s population in which multiple populations as butterflies and cool reef fishes.Humans are evolved from multiple interconnected spread out across Africa in large meta-population.
To learn more about Metapopulation here
brainly.com/question/2167013
#SPJ4
Answer:
6 of themmmmmmmmmmmmmmmm I thinkkk
The motor neuron disease amyotrophic lateral sclerosis (ALS) is deadly and progresses very quickly. It is known that astrocyte-related factors have a role in the death and degeneration of motor neurons in ALS. The role of astrocyte in increasing motor neuron protein aggregation, a characteristic clinical feature of ALS, is, however, still completely unknown.
<h3>What is ALS in medical terms ?</h3>
A uncommon neurological condition called amyotrophic lateral sclerosis (ALS) predominantly affects the nerve cells (neurons) in charge of regulating voluntary muscular activity (those muscles we choose to move).
- There is no single clear cause of sporadic ALS, despite the fact that numerous environmental factors have been connected to the disease. These include pesticides, viruses, radiation, and electromagnetic fields in addition to poisons like beta-methylamino-l-alanine (BMAA), which can be found in processed seafood.
Learn more about ALS here:
brainly.com/question/14863487
#SPJ4
Answer:
The answer is absolute age hope this help pls give me brainless.
