Cell Biology Answers

Why are conjugation and sporulation not considered as forms of reproduction in prokaryotic cells? What are the main purposes of these processes?

Are tissues considered as constant features of living things? Explain your answer shortly.

Two sister species of butterflies, Heliconius melpomene and Heliconius cydno, each mimic a different model species. While these species are largely sympatric, there are some areas in which H. melpomene occurs alone (i.e., allopatric to H. cydno). Mating studies show that H. melpomene females from these allopatric populations are more responsive to courtship by H. cydno males than are H. melpomene females from sympatry. What mechanism could explain this stronger behavioural isolation in sympatric compared to allopatric H. melpomene populations?

a) trait-based reproductive barriers

b) reinforcement

c) ecological speciation

d) prezygotic isolation

e) behavioural isolation

Two sister species of insects feed on different parts of the

same plant species, one on the stem and the other on the leaves. Hybrids between the insect species grow more slowly and have reduced survival, indicating some form of postzygotic barrier. Outline conceptually what you would need to show to infer that ecological speciation is the mechanism generating this reproductive barrier, and briefly

describe how you might test this.

Which consumes energy anabolic or catabolic

Which of the following best describes how daughter cells relate to a parent cell after cell division by mitosis?

Choose 1 answer:

Choose 1 answer:

• (Choice A)
  
• A
• Each daughter cell has the same genes as the parent cell.
• (Choice B)
  
• B
• Each daughter cell has a different set of genes from the parent cell, allowing the daughter cells to carry out different functions.
• (Choice C)
  
• C
• Each daughter cell has half the amount of genetic material as the parent cell.

Using diagram outline the stages of the life cycle of a named bryophyte (mosses)

why it is important to take the measurements from the same place on the dialysis

What relation does the structure of lymphocytes has with it's function

what is a cell wall?