Correct Answer: C. Directional selection

Explanation

The correct answer is directional selection. Directional selection is when, over multiple generations, an entire population shifts its phenotype towards one extreme. Stabilizing selection is when the extremes of that trait decrease in frequency compared to the less extreme phenotypes. In the example of size, the extreme phenotypes are very small and very large. Disruptive selection is when the different extremes of a trait in a population become more frequent than the less extreme version, eventually forming different populations of organisms. If disruptive selection continues long enough, the differences between the two populations can accumulate to the point when they cannot breed with each other. This is speciation.

Correct Answer: C. anthocyanins

Correct Answer: C. parietal placentation

Correct Answer: A. an afferent neurone

Correct Answer: A. pubic symphysis

Correct Answer: D) It is environmentally induced

Explanation

Fingerprints are unique patterns of ridges and furrows on the tips of our fingers. They have been used for many years in criminal investigations because they can help identify suspects. This Biology question is asking which statement about fingerprints is not true. Option A states that fingerprints are useful in detecting crime, which is true. Investigators can use fingerprints found at a crime scene to match them with a suspect's fingerprints. Option B says that no two individuals have the same fingerprint, which is also true. Even identical twins have different fingerprints. Option C states that fingerprints are a heritable character, which means that they can be passed down from one generation to the next. This is also true. Children often have fingerprints that are similar to those of their parents. Option D, which is the correct answer to the question, states that fingerprints are environmentally induced. This statement is not true. Fingerprints are formed during fetal development and are determined by genetic factors, not environmental factors. In summary, the correct answer to this question is Option D. Fingerprints are not environmentally induced. To learn more about this, please read the relevant sections of the recommended textbooks.

Correct Answer: C. noise

Correct Answer: A. Heart→ artery→ arteriole →tissue?

Correct Answer: A. heart, arteries, capillaries and veins

Explanation

(a) The main constituents of the mammalian blood are:

(i)Plasma/fluid matrix

(ii) Erythrocytes/red blood corpucles

(iii) Platelets/thrombocytes

(iv) Leucocytes/white blood cells or white corpuscles.

(b) Blood Constituents and their functions;

(i) Plasma:

(a) plasma transports end products of digestion or digested food especially glucose and amino acids.

(b) It transports waste products, hormones, heat from very actively respiring tissues, CO2, urea or waste materials, antibodies, amino acids and mineral salts.

(c) It participates in blood clotting.

(d) It transports oxygen.

(ii) Erythrocytes (Red blood cells):

(a) The red blood cells transport oxygen as oxyhaemoglobin.

(b) They transport small quantities of CO2 and

(c) They take part in blood clotting.

(iii)Leucocytes (White Blood Cells):

(a) Leucocytes defend the body against disease - causing organisms, for example, phagocytes engulf or ingest and breakdown disease-causing bacteria.

(b) They produce antibodies or immunity for the body.

(iv)Platelets: They aid clotting of blood.