False <span>its predator-prey relationship</span>
Answer:
Cell differentiation is how cells become specialized. This occurs through a process called gene expression. Gene expression is the specific combination of genes that are turned on or off (expressed or repressed), and this is what dictates how a cell functions.
Answer:
Body-centered sex
MEN
Explanation:
Sex is defined in various way and portrays different meaning. Some define Sex as always a means of closeness for procreation, or a way of showing love and feeling good(pleasure). To some, it is a sense of duty in fulfilling other partner's wish.
Body-centered sex is a kind of sexual expression where the emphasis is placed on physical pleasure. it focus and draw attention of having sex for pleasure rather than emotion. An old adage once say and i quote "women fall in love with people; men fall in love with genitals." Hence, Body-centered sex is common in MEN
Answer:
Once the oxygen diffuses across the alveoli, it enters the bloodstream and is transported to the tissues where it is unloaded, and carbon dioxide diffuses out of the blood and into the alveoli to be expelled from the body. Although gas exchange is a continuous process, the oxygen and carbon dioxide are transported by different mechanisms.
Transport of Oxygen in the Blood
Although oxygen dissolves in blood, only a small amount of oxygen is transported this way. Only 1.5 percent of oxygen in the blood is dissolved directly into the blood itself. Most oxygen—98.5 percent—is bound to a protein called hemoglobin and carried to the tissues.
Hemoglobin
Hemoglobin, or Hb, is a protein molecule found in red blood cells (erythrocytes) made of four subunits: two alpha subunits and two beta subunits (Figure 20.19). Each subunit surrounds a central heme group that contains iron and binds one oxygen molecule, allowing each hemoglobin molecule to bind four oxygen molecules. Molecules with more oxygen bound to the heme groups are brighter red. As a result, oxygenated arterial blood where the Hb is carrying four oxygen molecules is bright red, while venous blood that is deoxygenated is darker red.
Answer:
its (a)
Explanation:
<h2>A tissue is a group of red blood cells of common origin which are structurally similar and perform a particular function. Organ is a group of tissues and organ system is a group of organs.</h2><h2>Therefore, the correct answer is option A.</h2>
<h2>hope it helps you.</h2>
<h2>pls mark me as branliest </h2>
