Most eels breed at depths unattainable to modern diving equipment, which is why no-one has ever seen the eel mate with other eels.
This is the best answer I can do.
There are 23 pairs of chromosomes in each human cell and the autosomes (chromosome pairs 1-22) determine certain characteristics. However, there is still one more pair of chromosomes and these are called the sex chromosomes and they can either be shaped as XX or XY. The father's chromosome is the chromosome that determines whether it is a boy or girl, and there is an exact 50/50 chance of it being male or female you just need to draw a punnet square.
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Answer:
A controlled experiment is simply an experiment in which all factors are held constant except for one: the independent variable. A common type of controlled experiment compares a control group against an experimental group. All variables are identical between the two groups except for the factor being tested.
Explanation:
Answer:
1,2 × 10⁹ : 1
Explanation:
In fact, the average male will produce roughly 525 billion sperm cells over a lifetime and shed at least one billion of them per month. A healthy adult male can release between 40 million and 1.2 billion sperm cells in a single ejaculation.
Pollination only occurs with flowers. It is when pollen spreads from the male part of the flower to the female part of the flower. Fertilization only occurs with animals. Fertilization is when the sperm (from the male) attaches to the egg (in the female) which forms a zygote.
