The releasing on oxygen is essential for animals to breathe.
Answer:
D. toxins
Explanation:
<u>Toxins are not microorganisms</u>, in fact they are non-living substances/chemicals which can cause infection in our body. Toxins may be produced by microorganisms but they are themselves not microorganisms. Some of the examples of toxins produced by microorganisms are botulinum toxin A, tetanus toxin A, muscarine etc.
Other options can refer to potentially infectious type of microorganisms. Option A. talks about microbes, among microbes some are pathogenic. Option B. talks about pathogenic, as the name indicates will be infectious for sure.
Option C. talks about nonpathogenic, it may be non pathogenic at a time but later on it can be pathogenic. For example: some vaccines use inactivated microbes which are non pathogenic for generating antibodies in the body but later on in the human body when they get optimum conditions for growth they can turn pathogenic and start infecting our body.
Answer:
rough-skinned newts
Explanation:
The rough-skinned salamander, scientific name (Taricha granulosa) is a North American salamander known for the <u>strong toxin that exudes through its skin strong enough to kill an adult human</u>. Adults stay in ponds and lakes all summer and migrate back to the land in the fall, when the rain begins.
Its appearance is that of a rounded snout salamander, its color ranges from light brown to olive or brown-black at the top, with the bottom, including that of the head, legs and tail, with a yellowish orange contrasts with the brown top.
The diet consists mainly of a variety of invertebrates but also includes salanmandras and frogs, eggs and larvae and even small fish.
Generally all living organisms do have cell membranes, except viruses (this is still a controversial topic). I hope this helps :)
