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Amoeba and unlaid chicken egg are?
Answer: 2. Single cell. Explanation: Both amoeba and unlaid chicken eggs belong to the common category such as single cell. Alone, amoeba relates to two options, organism and single cell. However, the unlaid chicken egg relates to only one option, single-cell because it has no complete life at thisRead more
Answer: 2. Single cell.
Explanation:
See lessBoth amoeba and unlaid chicken eggs belong to the common category such as single cell. Alone, amoeba relates to two options, organism and single cell. However, the unlaid chicken egg relates to only one option, single-cell because it has no complete life at this stage. Hence the answer is 2.
When a healthy shoot of a flowering plant is illuminated from one side auxins accumulate on the
Answer: 3. Non-illuminated side of the shoot.
Answer: 3. Non-illuminated side of the shoot.
See lessWhich of the following statements about ecosystems is false?
Answer: 3. All the energy available in the ecosystem is transferred to decomposers.
Answer: 3. All the energy available in the ecosystem is transferred to decomposers.
See lessWhat is the role of acid in our stomach ?
Answer The stomach acid mainly hydrochloric acid is a part of gastric juice (a fluid substance that contains all digestive enzymes, HCl, and other substances). The gastric juice is produced by stomach cells. The acidic nature of gastric juice is mainly due to hydrochloric acid. In our stomach, foodRead more
Answer
The stomach acid mainly hydrochloric acid is a part of gastric juice (a fluid substance that contains all digestive enzymes, HCl, and other substances). The gastric juice is produced by stomach cells. The acidic nature of gastric juice is mainly due to hydrochloric acid. In our stomach, food is churned and broken down into smaller parts and mixed with gastric juice.
The enzymes and acid in the gastric juice partially digest the consumed food materials. The main enzymes of gastric juice include lipase and pepsin.
The functions of hydrochloric acid in our stomach:
See lessThe production of HCl by the stomach plays a crucial role in the digestion of food.
Gastrin is a peptide hormone that induces the secretion of stomach acid (HCl) by the stomach’s parietal cells and is also involved in gastric motility.
The acidic environment created by HCl is very crucial for enzymatic digestion.
Hydrochloric acid also plays an integral role in protecting the body from pathogens which are emerged through consumed food or water. If stomach acid levels are drop to pH.3, then there will be significant colonization of bacterial pathogens.
What happens if the acids are absent in your stomach?
The underproduction of hydrochloric acid (low levels of HCl) in the stomach is considered as the body’s abnormality, the condition is called hypochlorhydria.
In hypochlorhydria conditions, the body compromises the gastric barrier (a natural defense against microbes) and favors microbial growth in the small intestine, which resulted in the development of various bacterial infections.
Lower levels of gastric acid are also hinder the absorption of iron.
The enzymes pepsin and lipase are dependent on the acidic environment for their enzymatic activity. The deficiency in acid production in the stomach also leads to digestion problems.
Moreover, the lower levels of HCl in the stomach stimulates the production of more amount of the gastrin hormone, a condition is called hypergastrinemia.
Explain how auxins could cause hydrotropism.
Answer: Auxin is a plant growth-promoting hormone involved in all the mechanisms related to plant growth. Mainly three tropisms that are crucial for overall plant growth have been analyzed, which include phototropism (movement towards light), hydrotropism (movement towards moisture), and gravitropisRead more
Answer:
See lessAuxin is a plant growth-promoting hormone involved in all the mechanisms related to plant growth. Mainly three tropisms that are crucial for overall plant growth have been analyzed, which include phototropism (movement towards light), hydrotropism (movement towards moisture), and gravitropism (movement towards gravity). Interestingly, auxin plays an integral role in all three tropisms. In the case of hydrotropism, auxin accumulates the lower side of the roots (near root cap) in response to moisture and sends signals to the elongation part of the root to increase the root cell growth, resulting in the development of deeper roots to obtain the moisture or water.
In the case of phototropism, in response to light, auxin accumulates more at the shadow side of the stem and then induces cell division and growth. Due to this lop-sided growth (overgrowth at shadow side) stem bends towards a light to obtain more light in order to increase the rate of photosynthesis.
What do Auxins control in plants?
Auxin is an important plant hormone available in different forms including indole-3-acetic acid, indole-3-propionic acid, indole-3-butyric acid, phenylacetic acid, and 4-chloroindole-3-acetic acid. They all are responsible for various growth-related traits in almost all plants. The growth of any plaRead more
Auxin is an important plant hormone available in different forms including indole-3-acetic acid, indole-3-propionic acid, indole-3-butyric acid, phenylacetic acid, and 4-chloroindole-3-acetic acid. They all are responsible for various growth-related traits in almost all plants. The growth of any plant is based on cell number and cell growth. Hence the plant growth properties of these hormones could directly induce cell division, cell growth, and cell elongation. In addition, these endogenous auxins also play other roles especially in cell differentiation, apical dominance (is a condition in which the main shoot dominates and inhibits the growth of other parts of the plant), and phototropism (which is a phenomenon in which plant stem bends towards light).
See lessWhich of the following is most likely to move through the cell membrane by facilitated diffusion?
Answer: Simple ions (enter the cell by facilitated diffusion). @Water molecules and Alcohol (enter the cell by simple diffusion). @Proteins (enter the cells by active transport). Explanation: Before going to the complete answer, first, we learn what is diffusion and how many types of diffusion are tRead more
Answer: Simple ions (enter the cell by facilitated diffusion).
@Water molecules and Alcohol (enter the cell by simple diffusion).
@Proteins (enter the cells by active transport).
Explanation:
Before going to the complete answer, first, we learn what is diffusion and how many types of diffusion are there in biological systems?
Diffusion is a process by which biological molecules enter the cell from the region of their higher concentrations to their lower concentrations through the plasma membrane (downhill). Diffusion does not require energy; hence it is thermodynamically favorable.
Diffusion is mainly divided into two types based on the involvement of membrane proteins which include simple and facilitated diffusions.
1) In simple diffusion, molecules cross the membrane without membrane-bound proteins or channels. Simple diffusion examples: Small and non-polar molecules such as Water, Alcohol, Oxygen, Urea, Carbon dioxide, etc.
2) In facilitated diffusion, molecules reach the cytoplasm with the help of membrane proteins. Simple diffusion examples: Large and charged (polar) molecules like sugars and amino acids.
There is another process called active transport through which large polar and non-polar molecules will be entered the cell from their lower concentrations to their higher concentrations (uphill) through plasma membrane using membrane proteins (here we call them transporters instead of channels). Active transport requires energy to transporting any molecules against their gradient, hence it is thermodynamically unfavorable.
See lessChemical name of Na2CO3 ?
Answer: Sodium carbonate (Na2CO3) also called washing soda or soda ash is a sodium salt of carbonic acid.
Answer:
See lessSodium carbonate (Na2CO3) also called washing soda or soda ash is a sodium salt of carbonic acid.