Which is a true statement of crossing-over? During crossing-over, bits and pieces of the homologous chromosomes are exchanged

Homologous chromosomes move to opposite ends of dividing cells

The DNA of the diploid cell is copied

Crossing over decreases genetic diversity

The DNA of the diploid cell is copied

Explanation: Each diploid cell contains two copies of every chromosome, one derived from the maternal gamete and the other from the paternal gamete

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

you didn't give any options but heres what i can tell you: an inference is likely to change based on additional observations. the latter is something that you have seen or sensed using your sensory organs while the former is like a conclusion out from what you have observed.