Life Sciences Evens

2.) Group behavior in some animal species can increase the likelihood of survival for

individuals. Generally, group behavior benefits all members of the group; however, a

particular behavior may increase the risk for some individuals in the group. Select two behaviors that are most likely to reduce the likelihood of survival for the individual but that will increase survival of the group.

• A wolf joins a pack of wolves to hunt for prey.

• A honey bee defends the hive containing a queen.

• A fish swims in a school which confuses a predator.

• A ground squirrel makes a loud call alerting the group to the presence of a hawk.

• A wildebeest joins a group of other wildebeests to avoid attacks by a predator in open areas.

4.) A researcher is investigating population growth of an organism under two different sets of environmental conditions. The following data are collected. Which statement best explains the difference in growth between the two populations?

• A) Environment 1 is warmer than environment 2. This leads to a higher metabolic rate in the organisms in environment 1.

• B) There is a competitor in environment 2 that is not present in environment 1. This lowers the carrying capacity of environment 2.

• C) Environment 2 contains smaller organisms than environment 1. This means fewer organisms can fit into environment 2.

• D) The organisms in environment 1 reproduce at a younger age. This causes the population in environment 1 to grow faster than that of environment 2.

6.) Photosynthesis and cellular respiration are both important processes in the carbon cycle.

Students are modeling these two processes in order to better understand the carbon

cycle. The students are spending some class time gathering information in a table before

generating their models.

Complete the table by selecting the process each listed feature is most directly associated

with.

8.) Human blood type is a trait that is determined by multiple alleles. The ABO blood group

has three alleles: I^A, I^B, and i. Alleles I^A and I^B are co-dominant to each other, while allele i is recessive to alleles I^A and I^B. The genotypes and phenotypes of the ABO blood group are summarized in this table. Based on this information, select the probabilities that correctly complete the statements.

A child born to a mother with type AB blood and a father who is heterozygous for type A

blood has a​ ​ ​ (a)   ​ ​ ​ ​​ j​ n chance of having type A blood. The

probability that a child born to the couple is homozygous for type A blood is​ ​ ​ (b)  

• 50%
• 0%
• 25%
• 100%

10.) Sea otters were reintroduced to Vancouver Island, Canada, in 1969. Since then, their population has increased in size. Scientists monitored the sea otter population of

Vancouver Island from 1985 to 2019. The data are shown in the graph. Based on this information, the sea otter population most likely reached its carrying

capacity

• before 1988.

• between 1992 and 1994.

• between 1997 and 2000.

• after 2006.

12.) Select phrases from the lists to best complete the sentences.

After the arrival of the parasitic fly, the percentage of males with the flat wing (nonchirping)

phenotype most likely changed because the flat wing (nonchirping) phenotype is

​ (a)   ​ to the survival of male crickets.

This is because the flat wing (nonchirping) phenotype increases the likelihood of male

crickets​ (b)  

• an advantage
• a disadvantage
• Finding a food source
• attracting female crickets
• avoiding detection by the fly

14.) During their study, the researchers also observed a change in the mating behaviors of

male and female crickets. The researchers’ observations on male crickets are recorded in

Table 1. The researchers noted that the textured wing (chirping) crickets’ behaviors allow the flies to

find and parasitize the crickets that the flies need to survive.

The researchers compared the mating behavior of female crickets on Kauai with crickets

from another island with no parasitic flies. The observations are recorded in Graph 2.

• Male crickets are killed by female crickets shortly after mating.

• Flat wing (nonchirping) males are not detected by the parasitic fly but struggle to find

  mates.

• Textured wing (chirping) males attack flat wing (nonchirping) males when waiting for

  females.

• Flat wing (nonchirping) males are more likely to be targeted by the parasitic flies as

  they search for mates than textured wing (chirping) males are.

16.) The researchers claim that if textured wing (chirping) crickets were to completely disappear

from the Kauai cricket population, then the parasitic fly population would most likely disappear as well. Based on the information, provide one piece of evidence and reasoning to support the researchers’ claim. Enter your answer in the box provided.