Generate Quiz 68AF04F58FF9F

The production of GnRH is the responsibility of the endocrine system. GnRH is produced and released into your blood vessels by nerve cells (neurons) in the hypothalamus gland of your brain. After that, the hormone makes its way to the pituitary gland, which is located at the base of the brain.

Nicotine and tar, which are found in tobacco cigarettes, are carcinogenic. Carcinogens are substances that cause cancer. The most common and wide spread cause for lung cancer is smoking. The biggest risk factor for lung cancer is smoking, particularly among young adults. Smokers and those who live in smoky areas have ten times the risk of developing lung cancer compared to nonsmokers. According to current estimates, smoking causes 90% of lung cancer cases.

The length of the ‘A band’ stays constant while the ‘I band’ and the ‘H zone’ change. Since the I band gets smaller, “A” is not the correct response. Since the H zone vanishes during contraction, option “B” is incorrect.

A gene’s locus refers to where it is located on the chromosome.

The term “chemical messengers” is frequently used to describe neurotransmitters. The nervous system uses these molecules to send messages from neurons to muscles or between neurons.

Because they have evolved to live entirely dry on land, reptiles breathe through their lungs, while amphibians breathe through their skin, gills, and lungs. Their lungs do not contain amniotic sacs. Amphibians and reptiles are both cold-blooded. Three chambers, two atria, and one ventricle make up the heart of a reptile. Crocodilians, on the other hand, have hearts with four chambers.

There will come a time when the substrate has completely occupied all of the enzymes’ active sites and the pace of reaction is unaffected by the addition of more substrate when the concentration of the enzyme is maintained at a constant level while the concentration of substrate is progressively raised.

Since riboflavin, niacin, and ascorbic acid (vitamin C) are all classified as “water-soluble vitamins,” option D is accurate. However, because they dissolve in “organic solvents,” vitamins A, D, E, and K are referred to as “fat-soluble vitamins.”

The theory of natural selection was independently developed by Alfred Wallace, a contemporary of Charles Darwin. Wallace’s ideas, which were strikingly similar to Darwin’s theory, were outlined in a letter to Darwin in 1858. In 1858, Darwin presented this letter to the Linnean Society of London, along with his own unpublished work.

Option A is accurate since A gene found on one of the 22 pairs of non-sex chromosomes in the human genome is said to be inherited autosomally. There are two possible inheritance patterns for genes found on autosomes: dominant and recessive. Only one copy of the mutated gene is needed for the trait or disorder to manifest in dominant inheritance. Accordingly, if one parent has the gene mutation, the child has a 50% chance of inheriting the mutation and exhibiting the trait or disorder with each pregnancy. Achondroplasia and Huntington’s disease are two instances of autosomal dominant diseases. Two copies of the mutated gene are needed for the trait or disorder to manifest in recessive inheritance.

Food waste is converted to stool by the large intestine’s absorption of salts and water.

C is the right choice.

A reflex arc is said to be monosynaptic if it only has two neurons: one sensory neuron and one motor neuron.

It makes it possible for sensory and motor neurons to communicate directly, which stimulates muscles. The knee-jerk reflex is a typical illustration of a monosynaptic reflex.

The cytoplasm, nucleus, and other organelles including mitochondria, endoplasmic reticulum, and Golgi apparatus make up the protoplast, the live portion of a plant cell. It excludes all plastids and the cell wall. The protoplast is released when cellulase and pectinase enzymes are applied to a plant cell, breaking down the cell wall.

In the process of bacterial conjugation, conjugative pili facilitate the transfer of DNA between bacteria. Because they enable the exchange of genes through the creation of “mating pairs,” they are frequently referred to as “sex pili” in analogy to sexual reproduction. Flagella carry out locomotion, whereas microtubules carry out phagocytosis, pinocytosis, and exocytosis.

In the absence of oxygen, organisms must generate ATP through anaerobic respiration, which yields only two ATP molecules for every glucose molecule.

Option A: This is the incorrect choice because it belongs to the phylum of invertebrate animals.
Option B: This is not the right choice because it is a characteristic of a bilaterally symmetrical body.
Option C: This is the right response because it is a characteristic of an asymmetrical body.

Option D is incorrect because this is a characteristic of a radially symmetrical body.