Well for starters, producers are living organisms that produce their own food. Like plants. And plants ironically provide us humans with oxygen as they live off of the carbon dioxide we produce. Some plants are also main vegetables that we eat, so put simply, a world without producers would be practically oxygen-less and vegetable-less.
The answer is Archegonia and Antheridia. Female gametangia are called Archegonia while male gametangia are called Antheridia.
The statement is false. Squash and tomatoes are not vegetables, thus they considered as fruits.
The answer will be Half of the parent's genetic material.
There are many ways they can disrupt their new environments.
They can often carry diseases or parasites that native species are unequipped for. A good example of this is cats being brought to Australia, a continent with no native felidae. Cats are one of the main carriers of toxoplasmosis and many species in Australia had not evolved alongside felidae and were relatively unequipped to handle these parasites if their immune system was vulnerable.
They can also cause issue simply because they are so different, and the animals and plants living I. These areas are simply unable to defend themselves or keep up as a result. Such as pigs (and other animals brought over by humans) eating dodo bird eggs (these birds roosted on the ground) and domestic cats overhunting for sport.
Hope this helps a bit! It's a pretty broad topic and definitely one worth researching even more
If you have an incorrect number of chromosomes, then most likely the embryo will miscarriage. If, by some miracle, the embryo survives, then the embryo will have Down's Syndrome.