Other Biology Answers

What are the protein structures called that are expressed within the cell membranes and
interact with endogenous signalling molecules or some drugs to initiate an intracellular
response?
1. Enzymes
2. Hormones
3. Ligands
4. Receptors

Which of the following is NOT a type of cellular receptor?
1. Tyrosine kinase receptor
2. G-protein coupled receptor
3. Endocrine receptors
4. Intracellular/nuclear receptor.

If you hear that a community is experiencing light pollution, you would be concerned about the plants because:
Question 1 options:

herbivory will increase,


photosynthesis will speed up,


the photoperiod will be disrupted,


an excess of daylight will deplete their energy

Briefly describe the procedure adopted by Numerical taxonomists.

a) List the characteristics of the pollen grains that are useful as taxonomic
evidences.

b) Define the term species and briefly discuss the species concept.

a) Discuss the importance of system of binomial nomenclature.

b) Differentiate between :

i) Monophyletic and polyphyletic groups
ii) Cladogram and Phenogram
iii) Apomorphic and Plesiomorphic characters

Relative concentration of auxin in different parts of a seedling.

What substances in dead animals can only be decomposed by bacteria?

1- List the principal air pollutants and give the criteria set by EPA, TCEQ and WHO for these pollutants?

2- Describe health risk of pollutants in indoor dust in detail.

Occasionally homologous chromosomes fail to separate during meiosis 1. Using a hypothetical example of an adult organism that has two pairs of chromosomes, describe the chromosomal makeup of the eggs that would result from this error in meiosis.