Answer:
The correct answer is option B, that is, the cells of the animal body are defective in endocytosis.
Explanation:
In the given case, in my opinion, one should perform the experiment in a similar manner with no change. An experiment is done many times in order to omit any influences of sampling or handling on the outcomes of the study. For this purpose, the repetitive experiments have to be performed in a similar way as the previous ones were performed. After that, the outcomes of the repetitive experiment and the initial one are compared.
If any conditions or variables are changed in the experiment, the outcomes of the repeated experiment cannot be compared with the initial one. As variations in experimental material, variables, or procedure would have influenced the outcomes.
Answer:
The respiratory system has cells that produce MOCO OR MUCUS, which trap germs and dust. On their surface they have a large number of cellular structures called CILIAS, whose function is to spread mucus and direct it outwards. In the stomach, the digestive glands produce the STOMACH ACID, which, due to its extreme ACIDITY, attacks and destroys the PATHOGEN MICROORGANISMS that are introduced with food and drink.
Explanation:
In the respiratory and digestive apparatus there are two types of super specialized mucous upholstery, where the cellular world is challenged.
In the respiratory mucosa the production of mucus and the mobilization of the cilia are part of the innate response of the organism as well as the acidity that is generated in the upholstery and in the gastric tract.
The feature is called Evolution based on hypothesis. Charles Darwin's Hunting hypothesis was that Bipedalism freed the hands for making tools. Rodman and McHenry's patchy Forest Hypothesis, bipedalism was ore efficient than quadrupedalism such that forests diminished and food resources also became scattered. Also not valid because bipedalism evolved in a forest environment.
Owen Lovejoy's Provisioning Hypothesis that males assist females more efficiently in procuring food; the need for food hypo, Birth spacing would be reduced.
If grey feathers is a recessive trait, then 72.8% of the population is heterozygous for this trait.
Explanation:
The concept used here is of Hardy Weinberg principle, 
+2pq =1
The homozygous dominant genotypeis represented as 
= 84
Red = dominant
The homozygous recessive genotype trait is represented as 
= 16
grey = recessive
2pq = heterozygous individual
Thus for dominant homozygous the alleles are given as
p= 
= 9.1
q = 
= 4
for heterozygous individual 2pq
2 x 9.1 x 4
= 72.8
72.8% population is heterozygous for the trait.
Answer:
antibiotics are useless against viral infections this is because viruses are so simple that they use their host cells to perform their activities for them. so antiviral drugs work differently to antibiotics by interfering with the viral enzymes instead
