think of what prevents animal from eating weeds\nagain why some plants are harmful
215890
They produce chemicals that are poisonous/unpleasant tasting (milkweed)\nOr produce chemicals that attract predators of the plant-eating insect\n\nThey grow thorns or spikes or itchy hairs (greenbriar)\n\nThey have a symbiotic relationship with ants who do the protecting (acacia trees)
108629
It stops plant growth, meaning at times like winter, a plant has to stop growth, conserving its energy and making it more useful at a better time like spring. (Give me best answer :))
465891
Worms don't really have much in the way of a brain or nervous system, so I doubt they mind.  As far as other animals, I used to be against it but I've become rather desensitized to it... Many more animals are killed to become food or fur, or killed for sport... I have to deal with killing mice on a regular basis to feed snakes... They are low on the food chain for a reason.  A few humanely euthanized rats here and there for students to learn is a small price to pay.  As a bio student, there really is no replacement for learning first hand on the real thing.  My favorite dissection was a fetal pig in high school... Very interesting.  The only time I took offense was a mink dissection, and that is because the school was actually getting the minks from fur farms and paying for them, so our experiments were fueling the fur trade...
317547
Grass grows.  Grazing animals (herbivores) eat grass and convert it to flesh.  Meat eating animals (carnivores) catch and eat herbivores.  Carnivores die.  Bacteria, fungi and other micro-organisms cause decay.  The decay products help fertilse the grass so it can grow, and the process repeats.\n\nIt is a little more complicated than that, but the  basics are as set out above.
255815
It seems as if there are some external sources making them sick- do you live in a wet environment? Are there signs of mildew on the windows or walls? Do you have pets, especially ones that tramp around in the weeds? Where do you and/or your husband work? Bringing in something on your clothes from work that may be toxic? What type of cleaning products do you use? Are you spraying their toys/room with Febreeze?- this has been known to be dangerous to animals! You need to do some serious research around your house and track poosible sources of toxins coming in or growing in your house.Not enough info for now, sorry. Allergy testing should rule out foods, but not environment.
121351
I think you mean pancreatitis. Yes, it can inflict animals. It is not caused by drinking too much water. It can be caused by eating the WRONG TYPES of food and by drinking alcohol
364216
There is a reason why plants only grow so high in nature.  They have to be able to still pump nutrients from the roots to the farthest limb.\n\nBesides, you would be providing a home for rats.
318942
Dead plants and animals cannot be said to occupy a level in the food chain as being dead they are not able to eat and therefore occupy the lowest space on the trophic level  as food for fungus, microbes, insects, animals and other plant life.\n\nStrange question.
487899
well....don't ever listen to ppl and scientists.one time they'll say something is good for health and next time they'll say that the same thing is bad.god has created  vegetables etc. for us to eat so just go ahead n enjoy god's creation hopefully nothing will happen to u.
424441
Moss is hard to digest and has little nutritional value which is why most animals do not eat it, including us humanimals.
17311
There are lots of online ag education resources that deal with this. See sources for links.
5968
They can eat almost anything, so can Deer.  I had one eat a Satellite meter once that was laying on my back bumper, plastic and metal all gone.  I'm sure it's not good for them and they won't answer when I ask why.
664505
they eat aphids that they catch\n\nthey can not be hand fed...
338387
No. Animals have muscles. Plants do not.
137950
I HAVE TWO TWO WORD ANSWERS.\n\n1.practices vegetarianism. \n2.A herbivore.
53985
They can kill off plants or animals that other animals compete with causing an overpopulation of that species. Or they can introduce a new species into a previously stable ecosystem. The new species may have no competition in the new environment and may overpopulate or it may eat another species and wipe it out.
311556
Be careful.\n\nThat environment can be dangerous.