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sesenic [268]
3 years ago
7

Which of the following is an example of an antigen that might be recognized by the immune system of an individual?

Biology
1 answer:
Anvisha [2.4K]3 years ago
6 0

Answer:

Is there a choice for the following?

Explanation:

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Physical and chemical changes occur during digestion an example of a chemical change during digestion is
leva [86]

Answer:

Explanation:

Mechanical digestion physically breaks down food, like when teeth macerate food into a bolus. The stomach contracts and relaxes in a churning motion. ... Chemical digestion occurs when the bonds within larger food molecules are broken, creating smaller molecules that the body can use.

6 0
3 years ago
Read 2 more answers
A television advertisement claims that a certain brand of cough drop reduces coughing for 8 hours. Describe an investigation tha
Liono4ka [1.6K]

Answer:

See explanation below.

Explanation:

<em>Study Design - Partially double-blinded study</em>

  • The <u>cohort study </u>will be composed of 80 adults (aged ≥18 years) with a clinical diagnosis of constant coughing present as a result of a cold, which would be measured by semiautomated ambulatory cough monitor.
  • This study will be divided into an experimental group and a control group:
  1. No medication (natural drops; <em>e.g.</em> water; saline solution) - <em>Control group </em>
  2. Cough treatment - <em>Experimental group</em>
  • Data to be collected:

Participant cough will be recorded <u>every hour</u> (until 8 hours are reached) for two consecutive days (for repetitions) in both groups using semiautomated ambulatory cough monitor and analyzed statistically.

  • Observations:

Experimental group: <u>If coughing is significantly (statistical analysis) reduced within the 8 hours </u>(<em>after repetitions</em>) and a symptom improvement is observed, <u>the hypothesis that cough drops are effective is valid</u>.

Control group: To determine that cough drops treatment is effective, the no-treatment group should score worst and participant should not show significant improvement.

*<em>In scientific experiments, repetitions are important to prevent bias and error.</em>

6 0
3 years ago
Which of the following is an organic molecule?
bazaltina [42]

Answer:

glucose, water is found organisms but mixed with other substances

6 0
2 years ago
You are given an experimental problem involving control of a gene's expression in the embryo of a particular species. One of you
adell [148]

Answer:

B) You measure the quantity of the appropriate pre-mRNA in various cell types and find they are all the same.

Explanation:

In the above scenario, we are using the control gene and we should know about the control gene is that its expression is either at transcription level or at translation level. For this situation we should examine the pre-mRNA stage of control gene in various cells because it is control gene so it should be present in various cells.

So, the best practice is to quantify the pre-mRNA level of gene then we can effectively solve the experimental problem and find the gene expression either it is at transcription or translation level.

8 0
3 years ago
What stage of mitosis is depicted in the diagram below ?
iVinArrow [24]

Answer:

anaphase, think a=apart and the chromosomes are being pulled apart

7 0
2 years ago
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