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a) 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 bacteria is k selected, because k-selected species mature slowly, they have a longer life span and they provide more parental care so that when their offspring matures it can survive in any environment. Correct?
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) Calculate the density per cubic centimetre of Bacteria A on the agar plate if there are 1500 bacteria on a 100cm3 plate. (1 mark)
Dp=N/A
1500/100^3
= 15?
is this right??????
a. 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)
Speciation can occur without geographical separation through sympatric speciation. Sympatric speciation is best defined as, when two populations share the same geographic area. Ecological isolation can reduce gene flow, and mutations can lead to genetic isolation.
*** I need to know if my answer is correct. As i have an assignment that is due tomorrow.
In the absence of predators which curve depict prey population
a. DNA: TGG CCT ATA
mRNA:
tRNA:
AMINO ACID SEQUENCE:
TRAIT:
b. DNA: AAA TTT
mRNA:
tRNA:
AMINO ACID SEQUENCE:
TRAIT:
c. DNA: CCT GCG GCG
mRNA:
tRNA:
AMINO ACID SEQUENCE:
TRAIT:
d. DNA: TCG GCT
mRNA:
tRNA:
AMINO ACID SEQUENCE:
TRAIT:
e. DNA: AAA TTG
mRNA:
tRNA:
AMINO ACID SEQUENCE:
TRAIT:
Explain what is meant by abiotic and biotic factors in ecology
Write an essay about the importance of adaptation as a mechanism for the survival of species.
What main artery would be affected by a high systolic blood pressure number?
As the body breaks down large molecules into smaller molecules that the cells can absorb, it is exposed to bacteria and viruses on a regular basis. Which two body systems are interacting to keep you safe from invading organisms and chemicals?
Speciation is the formation of a new species. Answer the following questions.
a. 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)
Speciation can occur without geographical separation through sympatric speciation. Sympatric speciation is best defined as, when two populations share the same geographic area. Ecological isolation can reduce gene flow, and mutations can lead to genetic isolation.
is my answer correct?
