32 if im incorrect im sorry
<span>expressed clearly easy to understand.</span>
Answer:
Selection pressures are external agents which affect an organism’s ability to survive in a given environment
Selection pressures can be negative (decreases the occurrence of a trait) or positive (increases the proportion of a trait)
Selection pressures may not remain constant, leading to changes in what constitutes a beneficial adaptation
Types of selection pressures include:
Resource availability – Presence of sufficient food, habitat (shelter / territory) and mates
Environmental conditions – Temperature, weather conditions or geographical access
Biological factors – Predators and pathogens (diseases)
Answer:cell wall
Explanation: bacteria are prokaryotes,they do not have membrane bound molecules.they are surrounded by rigid cell wall that gives them their shape.bacteria do not posses nuclear membrane.prokaryotes are either archaea or bacteria.
Bacteria have cell walls which are made up of peptidoglycan.peptidoglycan consists of polysaccharides interconnected with muramic acids.the sugar polymer is cross-linked by amino acids.this peptidoglycan gives the bacteria cell structure and shape.pennincillin Is an antibiotics that works by affecting the structure of the peptidoglycan,there by allowing water into the bacteria cell. This causes the bacteria to burst and die,there by reducing it's population
Answer:
Humans use up many nonrenewable reacources every day, alongside renewable ones. One example of such is oil, oil takes millions of years to form, much longer than the amount of time it takes for us to use it up.
Explanation:
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