Produces clones adapted to the current environment

Increases genetic variation among offspring

Is faster and requires only one parent

Prevents mutations from spreading

To replicate DNA before cell division

To produce identical gametes

To halve the chromosome number and introduce variation

To trigger mitosis in sperm cells

Animal-assisted pollination

Wind-driven pollination

Self-pollination within closed flowers

Insect pollination with nectar reward

The test strip is faulty and contains no monoclonal antibodies at the test line.

The urine did not reach the test line due to a blocked membrane.

The concentration of hCG in the urine was too low to bind to the test line antibodies.

The woman is not pregnant and thus no hCG was present to trigger the test line.

Completion of meiosis I forming the first polar body (and a secondary oocyte).

Completion of meiosis II after fertilization, forming a haploid ovum and second polar body.

First meiotic division producing two equal daughter cells, each capable of fertilization.

Asymmetric division after mitosis, producing a polar body and a functional diploid ovum.