Answer:Bryophytes are called amphibians of the plant kingdom because these plants though live in soil but they need water for sexual reproduction.
Explanation:
When bad bacteria becomes resistant towards anti-biotics. They become stronger which can create a problem.
One organism can start producing more and can create an over-population, would create a domino effect.
Katie will use the black, red and purple balls in a ratio 1:2:1 for carbohydrate molecules.
There are four macro molecules in existence, these are carbohydrates, proteins, fat and oil and nucleic acids. All these molecules has carbon in their compounds. The carbohydrate is made up of the elements carbon, hydrogen and oxygen in the ratio 1: 2: 1, thus, the molecular formula of carbohydrate is C6H12O6.
The non-protein microbial antigens<span> can not stimulate classical </span>T<span> cell response by themselves, but they are able to elicit the production of antibodies, so that is why we call them </span>T<span> or thymus </span>independent antigens<span>. </span>T independent antigens<span> are divided into 2 classes by the mechanism of activating B cells. TI-1 </span>antigen<span>.
</span><span>For most protein antigens, the production of antibodies by B lymphocytes isdependent on stimulation of helper T cells. However bacterial polysaccharides and lipopolysaccharides, and some polymeric proteins, can stimulate B lymphocytes without involvement of helper T cells.
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<span>Population crash is a sudden decrease in the number of people found in a given area as a result of shortage or the lack of environmental resources necessary for reproduction, survival and growth of the population. It is also known as a die back. The answer to your question is A. population crash.</span>