What is an indicator species? How are indicator species used to assess pollution levels in the environment?

For each of the following characteristics, indicate whether the trait is common to Phylum Arthropoda or specific to certain classes of arthropods: wings, chewing mouthparts, jointed appendages,...

In a few sentences, what were Mendels key ideas about inheritance?

The following pedigree shows the inheritance of a recessive trait. Unless there is evidence to the contrary, assume that the individuals who have married into the family do not carry the recessive...

A geneticist crosses tall pea plants with short pea plants. All the F 1 plants are tall. The F 1 plants are then allowed to self-fertilize, and the F 2 plants are classified by height: 62 tall and 26...

Which of the following pairs of DNA sequences could qualify as target site duplications at the point of an IS50 insertion? Explain. (a) 5-AATTCGCGT-3 and 5-AATTCGCGT-3 (b) 5-AATTCGCGT-3 and...

The Boston barberry is an imaginary plant with a diploid chromosome number of 4, and Boston barberry cells are easily grown in suspended cell cultures. 3H-thymidine was added to the culture medium in...

A nutritionally defective E. coli strain grows only on a medium containing thymine, whereas another nutritionally defective strain grows only on a medium containing leucine. When these two strains...

A Drosophila geneticist crossed females homozygous for three X-linked mutations (y, yellow body; B, bar eye shape; v, vermilion eye color) to wild-type males. The F 1 females, which had gray bodies...

Eight independently isolated mutants of E. coli, all of which are unable to grow in the absence of histidine (his), were examined in all possible cis and trans heterozygotes (partial diploids). All...

Use the Internet to research cosmetic surgery. Write a paragraph explaining how a plastic surgeon might manipulate each of the four main tissue types.

Distinguish between the following. a. Organs and organ systems b. Simple squamous and stratified squamous epithelial tissue c. Loose and dense connective tissue d. Skeletal and cardiac muscle tissue...

Describe the events that occur during one cardiac cycle.

What is the function of heart valves? Why might a person with a leaky heart valve feel short of breath?

Referring to figure 30.4, speculate about which blood type is considered the universal donor and which is called the universal recipient. Explain your answer. Figure 30.4 Donor blood group AB A A...

What are the two main functions of food in an animals body?

On a per-kilogram basis, why does a small mammal such as a shrew require so much more energy than does an elephant or other large mammal?

A solution at 107 C contains 50 mol% water (W) and 50 mol% formic acid (F). Using (2-72) with vapor pressure data and the van Laar equation with AWF = -0.2935 and AFW = 0.2757: (a) Compute the...

A test leaf filter is used to determine the filtration rate for an unclarified broth from a fermentor. At a pressure drop of 50 kPa, 150 mL of filtrate are collected in 30 minutes. If the resistance...

A 6-inch demister pad is to be used to separate liquid entrainment from a gas in a horizontal flash drum. Calculate the demister diameter using the following data: Vapor flow rate = 465 cfm at 110F...

For a solid, spherical particle of 0.8 mm in diameter and a density of 2,600 kg/m 3 that is immersed in a fluid of density 1,200 kg/ m 3 and a viscosity of 1.0 cP, calculate (a) The unhindered...

Fifty wt% methylcyclohexane (MCH) in n-heptane is fed to a countercurrent, stage-type extractor at 25 C. Aniline is the solvent and reflux is used at both ends of the column. An extract containing...

Liquids A and B, which have nearly identical boiling points, are to be separated by liquidliquid extraction with solvent C. The following data represent the phase equilibrium at 95 C. Determine the...

CaCO 3 precipitate can be produced by reaction of an aqueous solution of Na 2 CO 3 and CaO, the byproduct being NaOH. Following decantation, slurry leaving the precipitation tank is 5 wt% CaCO 3 ,...

A slurry is passed through a filter cloth 0.02 m 2 in area at a constant rate, with 4 x 10 5 m 3 /s of filtrate being collected. After 100 s, the pressure is 4 x 10 4 N/m 2 ; after 500 s, it is 1.2 x...