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Simple biology questions I need help on with a thorough and accurate explanation   1

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Simple biology questions I need help on with a thorough and accurate explanation

 

1. You observe 40 crickets on an island after crickets were first introduced 2 years ago. At lambda = 2 how many crickets must have been introduced? please show work for this one.

A) 6.3

B) 10

C) 5

D) 20

 

2. Which of these conditions are necessary for a population to evolve due to natural selection?

CHOOSE ALL THAT APPLY FOR THIS ONE

A) The population must vary in traits that are heritable.

B)Individuals pass on all traits they acquire during their lifetime.

C)Some heritable traits must increase survivability and/or reproductive success.

 

3. Elephants can live for 60 to 70 years having multiple offspring during their life time. What type of population growth would best describe this species?

A) stable population growth

B) discrete population growth

C) logistic population growth

D) continuous population growth

 

4. What term best describes interactions among members of the same population?

A) interspecific

B) intraspecific

 

5. You are in charge of creating a mathematical model that describes the population growth of a species of butterfly where the adults lay their eggs in the fall and then die. What type of population growth best describes this species?

A) stable population growth

B) logistic population growth

C) continuous population growth

D) discrete population growth

 

6. A man who carries an allele on an X-linked gene will pass it on to

A) All of his sons

B) All of his daughters

C) All of his children

D) Half of his daughters

 

7. For a human, what is a major difference between meiosis Il and mitosis?

A) Sister chromatids separate in mitosis, and homologues separate in meiosis Il

B) Meiosis Il takes place in a haploid cell, while mitosis takes place in a diploid cell.

C) Crossover takes place in meiosis II

D) Homologues align on the metaphase plate in meiosis Il

 

8. Which of the following best describes a population?

A) a group of organisms that are capable of interbreeding

B) a group of animals living in the same location at the same time

C) a group of individuals interacting together in the same location

D) A group of organisms of the same species living in the same location at the same time

 

9. Which of the following observations would cast doubt on the top-down hypothesis explaining

population cycles in snowshoe hares.

A) hare populations stop cycling and remain stable in the absence of predators

B) hare populations stop cycling and remain stable when give supplemental food

C) hare populations increase in the absence of predators

D) Hare populations remain cycling in abundance in the absence of predators

 

 10.For a biologist studying nematodes in the lab, which Hardy-Weinberg condition is the most difficult to meet? That is, the researcher has no control over this.

A) No gene flow

B) No mutation

C) Random mating

D) No selection

E) No genetic drift

 

 11. You want to test the hypothesis that a pronghorn antelope population is limited by the presence of coyotes in the environment. What manipulation would most be suitable?

A) You relocate the antelope to another location

B) You provide supplemental food for the antelope

C)You provide supplemental food for the coyotes

D)You enact a coyote control program where coyote populations are reduced.

 

 12.You notice a small population of 10 crickets has established themselves on an island and are growing at a rate of lambda= 1.5. How many crickets will there be in two years? Please show work on how you solved this one. I'm pretty confused on this one. 

A) 30

B) 22.5

C) 225

D) 15