The answer is A as corals are very delicate to their surroundings
I think it’s C explanation : i learned this a while ago
Answer: when bright light is present, the pupil reduces in size, or flinching when feeling threatened
Explanation: i know what reflexes are :)
Answer:
d. The cell walls of bacteria are composed of peptidoglycan
Explanation:
Bacterial cell wall is made of peptidoglycan or murein. It is made of sugars and amino acids. Sugar component consists of N-acetylmuramic acid (NAM) and N-acetylglucosamine (NAG) alternating residues. A peptide chain of three to five amino acids is attached to NAM.
Gram positive bacteria have thick cell wall made of many peptidoglycan layers. Whereas gram negative bacteria have a thinner layer. The peptidoglycan cell wall is required for the survival of the bacteria hence it is targeted by many antibiotics like penicillin.
A test cross can be used to determine the genotype of the parent (whether it is homozygous or heterozygous for a specific trait).
AA x aa = all Aa offspring, dominant phenotype.
<span>Aa x aa = 1/2 Aa dominant and 1/2 aa recessive
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