questions i dont get yet

Question 1

Describe the mechanism of glucose symport.

Answer 1

1. Sodium-potassium pump pumps
   Na+ out of cell
2. Sodium-potassium pump
   generates lower concentration of
   Na+ within cell
3. (Glucose) symporter/transporter
   transports Na+ down its
   concentration gradient
   OR
   Sodium diffuses in via the
   transporter
4. Alongside/together with glucose
   (which is transported against its
   concentration gradient)

Question 2

State the term for a checklist of animal behaviours

Answer 2

Ethogram

Question 3

Why does producing a checklist of animal behaviours increase the validity of a study?

Answer 3

Allows the data collection between sample periods to be compared

Reduced the variability of the interpretation of behaviour

Question 4

Name the type of proteinase activated by apoptosomes.

Answer 4

caspase

Question 5

Explain how members of a homologous pair may differ
genetically

Answer 5

(genes correspond but) alleles differ
OR
maternal and parental origin of DNA

Question 6

Why is it important to control pH in immunoassays

Answer 6

pH affects the solubility/structure of proteins

therefore protein will have reduced affinity for antibodies in plate

Question 7

The red queen hypothesis

Answer 7

organisms in an ecosystem must constantly evolve and adapt to remain competitive and avoid extinction due to the coevolutionary pressures of their biotic interactions with other species

Question 8

species specific sign stimuli

Answer 8

external sensory cues that trigger a specific, often innate, behaviour in animals of a particular species

Question 9

honest signals

Answer 9

communication cues that accurately convey information about an individual’s traits, abilities, or intentions.