1. Interstitial fluid directly influences the proper functioning of cells.
2. Effector refers to the structure of a feedback system, which gets output from the control center.
3. Receptor refers to the structure of the feedback system, which donates input to the control center.
4. Childbirth refers to the condition not regulated by a negative feedback loop.
5. Sign refers to the change in the function of the body, which can be determined objectively.
6. The cranial cavity refers to the large, bean configured cavity occupying the majority of the upper skull where the brain is situated.
7. The thoracic cavity compries of the lungs and is located in the mediastinum.
8. The abdominal cavity is the region where stomach is located.
10. The pericardial cavity comprises the heart.
I have some doubt in Question no 9.
Answer: If this population were in equilibrium and if the sickle-cell allele is recessive, the proportion of the population susceptible to sickle-cell anemia under typical conditions should be 0.20
Explanation: Hardy-Weinberg law provides an equation to relate genotype frequencies and allele frequencies in a randomly mating population. The equation is;
p² + 2pq + q² = 1
For 2 alleles such as A and a, where
p² = homozygous dominant
q² = homozygous recessive and
2pq = heterozygous
From the question, it is said that the sickle-cell allele (SS) constitutes 20% (that is, 20/100) of the hemoglobin alleles in the human gene pool and it is also said to be the homozygous recessive allele.
Therefore, q² = 20/100 = 0.20
Options:
A. Analogous structures
B. Vestigial structures
C. Homologous structures
D. Missing links
Analogous structures is the illustration in cephalopod. Thus, the correct option is C.
A cephalopod eye, unlike a vertebrate eye, is focused through movement, similar to a camera or telescope lens, rather than altering shape like a human eye lens. The lens, which is totally internal, is nearly spherical, as is the eye.
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What are the characteristics of cephalopod?</h3>
- Organs. They have three hearts, two of which transport blood to the gills and the other which pumps blood throughout the body. Their blood is blue because the protein hemocyanin binds oxygen.
- Color. Cephalopods have the ability to change the color of their skin at will. They can even use their skin to create elaborate patterns and forms. This is accomplished by the use of chromatophores, which are pigment-filled bags found in the skin. Nerves can change the color of the skin by controlling these chromatophores.
- Diet. Cephalopods are all carnivorous animals.
Organs, tissues, or cells in the body that are no longer functional in their ancestral version of the trait are known as vestigial organs.
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Explanation:
Observations allow us to collect data that we can connect back to the central problem. From this data we can start to form hypotheses (predictions on possible solutions or outcomes).
A punnet square is a chart to help figure out the possible genotypes of two organisms' offspring.
hope it helps!
