Biology Answers

Make clear and labelled diagrams of the various stages of hydrarch or xerarch

succession. (10)

How does the wildlife get affected by the degradation of the ecosystem due to 

various causes? Also give measures for the conservation of the wildlife. 

(5+5)

List of Traits

Cys-Tyr-Met-Cys-Asn= Straight hair

Cys-Tyr-Met-Leu-Asn= Curly hair

Cys-Asn-Gly-Thr-Phe= Red hair

Cys-Asn-Gly-Thr-His= Green hair

Thr-Pro-Arg-Ser-Phe-Phe= Tall

Thr-Pro-Arg-Tyr-Phe-Tyr= Short

Ala-Glu-Tyr= Big eyes

Ala-Glu-Leu= Small eyes

Ile-Leu-IIe-Cys-Trp= Long tail 

IIe-Leu-Cys-Trp-Thr= Short tail

Asn-Cys-Met-Leu-Cys= Brown skin

Asn-Cys-Met-IIe-Val= Yellow skin

Ser-Arg-Trp-Cys= Male

Ser-Pro-Leu-Cys= Female

DNA (leading strand):  5’ AGTCGTTGGTGT  3’

            DNA (lagging strand):   

            mRNA:  

            tRNA:  

            Amino acid sequence:  

            Trait:  

Meiosis cell diagram needed

Biochemical compounds play important structural and functional roles in cells of all living organisms. How does maintaining the integrity of the cell membrane illustrate the interaction of cell components and the biochemical compounds of which they are composed?

what is the relationship between d-altrose and d-glucose

1.     Explain chemical warfare and its role in predator-prey interactions. Provide an example of the use of chemicals or toxins. (2 marks)

 doing an assignment right now and i am kind of confused on how to answer this question. please help me out thank you.

1. c)   Assume the population of Bacteria B completely dies off. Bacteria A are now transferred to an open environment where they have lots of room for growth and a continual supply of food. Over the course of three days, the population of bacteria steadily increases as follows:

Day 1: 1500 bacteria

Day 2: 3000 bacteria

Day 3: 7000 bacteria

Day 4: 13,000 bacteria

Is this population of bacteria r-selected or k-selected? Explain how you arrived at your answer. Hint: Review your definitions of “r” and “k.” (2 marks) this goes with my other question 1 a &b. question was to long for me to upload all at once.

it goes with #1 a &b. it was too long for me to upload all at once so i split it up. please help me with these questions thank you.

1.     Bacteria A and Bacteria B are considered hardy bacteria and can survive in extreme environments when grown individually. However, when they are grown together in a closed environment (on an agar plate), Bacteria A thrives, while Bacteria B eventually dies off.

a)     Using your knowledge of competitive exclusion, explain what has happened. (2 marks)

b)     Calculate the density per cubic centimetre of Bacteria A on the agar plate if there are 1500 bacteria on a 100cm³ plate. (1 mark)

1.     Speciation is the formation of a new species. Answer the following questions.

a.     What two factors are necessary to produce a new species? (2 marks)

-         Isolation

-         Genetic divergence

b.     You are having a conversation with Cindy, the magic turtle. Cindy is very curious about the formation of species. She tells you excitedly how one species of turtle inhabited the same geographical area, but ended up forming two different species over time. She admits she is a bit surprised by this; she thought that populations needed to be geographically separated from each other in order to form two different species. Explain to Cindy how speciation can occur without geographical separation. Name the type of pathway to speciation that occurred in this case. (3 marks)

Not sure how to answer b please help me thanks.