### Calculate the projected population size in 2025 and 2050

Assignment Help Biology
##### Reference no: EM132280126

a)The population growth rate due to the difference in births and deaths in the U.S. is estimated to be 0.6% per year (r =0.006). Given a 2001 population size of about 285 million, calculate the projected population size in 2025 and 2050.

b) Immigration from legal sources (660,000 in 1998) and illegal sources (estimated to be about equal to legal immigration) minus emigration (usually less than 200,000 per year) adds about 1 million people per year to the U.S. population. The total population growth rate from all sources in thus about 0.9% per year (and immigration is thus responsible for about 1/3 of this growth). Given this rate, calculate the projected U.S. population size in 2025 and 2050.

#### How do protein molecules freeze the water

A structural protein may incorporate large amounts of immobilized water as part of its structure. How do protein molecules "freeze" the water in place and make it part of th

#### Find rate of mutation is constant throughout life

The incidence of most cancers increases with age in a non-linear fashion. Assuming that the rate of mutation is constant throughout life, why do you suppose the incidence of

#### Estimate channel length required for mixing

Determine channel length (in cm) needed for mixing by diffusion two solutions flowing at a speed of 1 cm/s, one of which is water and the other is a salt solution.

#### Identify articulation site that allows us to rotate our head

1) Identify the articulation site that allows us to nod our head "yes". choice (A) or (B) (A) Occipital bone - axis (B) Occipital bone - atlas Identify the articulation site

#### How are binary fission and mitosis different

Drugs that inhibit microtubule assembly are administered for some medical conditions. What will occur to the cell as a result? For what type of conditions would such a drug

#### Controlled by a recessive gene

Albinism in human is controlled by a recessive gene 'a'. If both parents were known to carrier (Aa) for albinism. What is the chances of 1 normal and 3 albino in family of f

#### Mosquitoes are medically important pests as adults

Mosquitoes are medically important pests as adults but their larvae are important in fish and predatory insect food webs.  If you wanted to control mosquitoes with hormone mim

#### Identify the role certain compounds to neuron function

What would be produced first, a leaf primordium or its trace? Explain. Identify the role certain compounds to neuron function. Which phylum do you think an anmal with two body