Question

Any 2 please give me answer​

Answer 1

Answer:

Answer 1 different external and internal respiration

External Respiration:

• It is a physical pro­cess in which oxygen (O2) is absorbed and carbon dioxide (CO2) is given out.

• Enzymes do not play any role in the process.
• Restricted to respi­ratory organs only.

• Respiratory struc­tures are body sur­face, gills, lungs, etc. exposed to the sur­roundings.

• Sites of gaseous ex­change—moist respi­ratory surfaces; in­flow of O2 and out­flow of CO2 occurs through plasma membrane by passive diffusion.

• Partial pressure of O2 in the surround­ings determines the rate of O2 diffusion.

Internal Respiration:

• It is a chemical re­action in which oxy­gen (O2) combines with carbohydrates, fatty acids and amino acids (biological oxi­dation), producing carbon dioxide (CO2), water and energy.

• The whole process is enzyme controlled.It takes place in all living cells.

• Respiration occurs within the cells.

• Sites of reaction— cystosole of the cell and mitochondria; O2 and CO2move in and out of the cell through plasma membrane by passive diffusion.

• Pressures of O2 and CO2 inside the cell and interstitial fluid determine the rate of diffusion of the gases and CO2 concentra­tion in blood influ­ences the release of O2 from oxyhaemo­globin (HbO2).

Answer 2 sexual and asexual

sexual reproduction

• Occurs almost in all types of multicellular organisms including humans, animals, and higher plants.

• It is usually bi-parental

• Gametes are formed.
• Germ cells of parents are involved.
• Fertilization takes place.
• Presence of fully developed reproductive organs.
• Both meiosis and mitosis type of cell division occurs.

asexual reproduction

• Occurs in prokaryotic microorganisms and in some eukaryotic unicellular and multicellular organisms, lower invertebrates and plants
• It is uniparental.
• Gametes are not formed.
• Somatic cells of parents are involved.
• No fertilization occurs.
• No involvement of reproductive organs.
• Only mitosis type of cell division occurs.

Answer 2

1.Acids have a pH less than 7. Alkalis have a pH greater than 7 Neutral substances have a pH equal to 7. ... Acids contain lots of hydrogen ions, which have the symbol H+. Alkalis contain lots of hydroxide ions, symbol OH-.

2. External Respiration: External respiration refers to the gas exchange across the respiratory membrane of lungs. Internal Respiration: Oxygen diffuses out from the blood into tissue during internal respiration. ... Internal Respiration: Carbon dioxide diffuses into the blood from the tissue during internal respiration.

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