Practice BIOLOGY 2.0

Fill in the blanks in order to make the sentence an example of how the body uses negative feedback to maintain homeostasis:

When body temperature begins to rise, ​ (a)   , which causes the body temperature to ​ (b)   .

• the sweat glands release sweat
• lower
• the heart rate increases
• rate of hair growth speeds up
• the body digests food more quickly
• the rate of hair growth speeds up
• the stomach digests food more quickly
• the body begins to shiver
• continue to rise
• remain exactly the same

Select all of the following which are true about axolotls, oak trees, and amoebas:

• They are all in the same domain

• They are all in the same kingdom

• They have the same number of chromosomes

• There DNA is composed of the same 4 types of nucleotides

• They all have cell walls

Students made a closed bottle ecosystem modeling an aquatic environment. The things they put inside there ecosystem are listed below; of these, select the two items that are mainly driving the carbon cycle in the bottle:

• An aquatic snail

• Christmas tree moss

• Small pebbles

• bottled water

• a piece of drift wood from a fish tank (which has numerous species of bacteria growing on it).

Click the hotspots on the chart to show which kingdoms are eukaryotes and which can be multicellular.

(Animalia is already done for you, and both circles are green because Animalia can be multicellular and is Eukaryotic.)

When she is running track, Avery breathes in more ​ (a)   and breaths out more ​ (b)   then when she is resting. This change is due to her cells needing to perform ​ (c)   more quickly so that they can produce enough ​ (d)   for her muscle to have the energy they need.

• oxygen
• carbon dioxide
• cellular respiration
• ATP
• photosynthesis
• fermentation
• cytoplasmic streaming
• ADP
• RNA
• Water

The phylogenetic tree shows how some cat species are related to each other. Knowing that Lions and Tigers can breed (although the offspring are sterile), select all of the other cats that you would expect the lion to be able to breed with:

• Domestic Cat

• Leopard

• Jaguar

• Cheetah

• Ocelot

4 of the 5 images below show the process of an enzyme reacting with a substrate, but the 5th picture is not a part of the real process (I just made up an imaginary step). Put the 4 steps in the correct order and then put the incorrect image at the end.

• 
• 
• 
• 
• 

Some axolotls have been genetically engineered to introduce the gene for Green Florescent Protein. This gene is dominant, and causes the individuals to glow green when exposed to blue LEDs. If two axolotls that are heterozygous for Green Florescent Protein are breed, what percentage of the offspring would glow under blue light?

Mathematical Equivalence

ON

Flying squirrels, while they cannot actually fly, are a tribe of squirrels that have a parachute-like skin membrane stretching from their wrists to their ankles. This skin membrane allows them to glide from tree to tree.

Which statement best explains why natural selection led to flying squirrels developing the skin membrane?

• The squirrels were able to quickly glide from tree to tree quick allowed them to mate more frequently.

• The ability to glide allowed the squirrels to live in rocky and mountainous areas where they could not otherwise live.

• The squirrels changed their DNA to express the extra skin flap, changing the allele frequency of the population.

• The squirrels with the extra skin flap could glide from tree to tree to escape predators, which increased their fitness.

• Female squirrels prefer males that can fly long distances, which allowed these males to mate more frequently.

A group of scientists took 10 samples at different points in time from cells that were going through the cell cycle. For each sample, they determined the amount of DNA per cell and made this chart. Assuming that one sample was taken at the end of each phase of the cell cycle, select all of the samples which were taken during G2 phase,