Science assignment 20 will give brainliest for first due in 30 ! the snowflake starts as part of the cryosphere because it is frozen. as it passes through the atmosphere, let’s assume that it melts and becomes part of the hydrosphere. when it falls to the ground as rain, it will be filtered through the ground. the ground is part of the geosphere. it may end up in a lake where it is consumed by an animal. now it is part of the animal, so it is part of the biosphere. this is just one example of how all the systems interact. let’s go back to our bear on the introduction page. how do you think he fits into and interacts with these systems? write a description of how our bear interacts with each of the systems.

The snowflake starts as part of the cryosphere because it is frozen. As it passes through the atmosphere, let's assume that it melts and becomes part of the hydrosphere. When it falls to the ground as rain, it will be filtered through the ground. The ground is part of the geosphere.Groundwater is the water present beneath Earth's surface in soil pore spaces and in the fractures of rock formations. A unit of rock or an unconsolidated deposit is called an aquifer when it can yield a usable quantity of water.Seafood effects the hydrosphere, biosphere, and geosphere. Seafood live in the earth's oceans and waters which directly affect the hydrosphere. They also are living organisms and are food to many other organisms affecting the biosphere. Finally, organisms eat the seafood and deposit it into the geosphereBlack bears are important in ecosystems because of their effects on populations of insects and fruits. They help to disperse the seeds of the plants they eat and consume large numbers of colonial insects and moth larvae. They sometimes take small and large mammals as prey, such as rabbits and deer.

Here you go hope I helped.

the correct answer is c   with the systems

the african cheetah.

this species has a relatively low level of genetic

variation because the population was reduced to a small size approxi-

mately 10,000 to 12,000 years ago.

chapter   outline

24.1

genes in populations and the hardy-

weinberg equation

24.2

factors that change allele and genotype

frequencies in populations

24.3     sources of new genetic variation

population   genetics

24

until   now,   we   have   primarily   focused   our   attention   on   genes  

within   individuals   and   their   related   family   members.   in   this  

chapter   and   chapters   25   and   26   ,   we   turn   to   the   study   of   genes   in  

a   population   or   species.   the   field   of

population   genetics

  is   con-

cerned   with   changes   in   genetic   variation   within   a   group   of   indi-

viduals   over   time.   population   geneticists   want   to   know   the   extent  

of   genetic   variation   within   populations,   why   it   exists,   and   how   it  

changes   over   the   course   of   many   generations.   the   field   of   popu-

lation   genetics   emerged   as   a   branch   of   genetics   in   the   1920s   and  

1930s.   its   mathematical   foundations   were   developed   by   theoreti-

cians   who   extended   the   principles   of   gregor   mendel   and   charles  

darwin   by   deriving   formulas   to   explain   the   occurrence   of   geno-

types   within   populations.   these   foundations   can   be   largely   attrib-

uted to three scientists: sir ronald fisher, sewall wright, and j. b. s.

haldane.   as   we   will   see,   support   for   their   mathematical   theories  

was provided by several researchers who analyzed the genetic com-

position   of   natural   and   experimental   populations.   more   recently,  

population   geneticists   have   used   techniques   to   probe   genetic  

variation   at   the   molecular   level.   in   addition,   staggering   advances  

in   computer   technology   have   aided   population   geneticists   in   the  

analysis   of   their   genetic   theories   and   data.   in   this   chapter,   we   will  

explore   the   genetic   variation   that   occurs   in   populations   and   con-

sider   the   reasons   why   the   genetic   composition   of   populations   may  

change over the course of several generations