The correct answer is D. Both A and C
Explanation:
In biology, a phenotype refers to a trait or characteristic that is observable in an organism, including physical characteristics, physiological characteristics, and behavioral characteristics. The phenotype is the result of the expression of genes or environmental factors. Considering this, both "a certain duck has a blue beak" and "most cheetahs live solitary lives" are phenotypes because they are traits that can be observed in terms of morphology or physical characteristics in the case of the duck or in terms of behavior in the case of the cheetah. On the other hand, a mutation is not necessarily a phenotype except if it is expressed.
Answer:
M glycoprotein..
The coronavirus attaches to a membrane protein called M glycoprotein..
<h2>The given statement is true</h2>
Explanation:
Iron absorption occurs in the duodenum and upper jejunum of small intestine
- At physiological pH ferrous iron is rapidly oxidized to the insoluble ferric form
- Gastric acid lowers the pH in the duodenum which enhances the solubility and uptake of ferric iron
- Once iron gets inside the enterocyte it can be stored as ferritin;Ferritin is a hollow spherical protein which helps in storage and regulation of iron levels within the body
- Ferritin molecule have ferroxidase activity which helps in the mobility of Fe2+ out of the enterocyte by ferroportin
- Transferrin is the major iron transport protein which transports iron through blood
- Fe3+ binds to transferrin so Fe2+ transported through ferroportin must be oxidized to Fe3+
- Fe2+ needs to be oxidized first so that it can be transported through ferroportin
- Once iron gets inside the cell it can be used for various cellular processes
<span>Wax is a simple form of lipid
molecule. It consists of a long-chain of alcohol and a fatty acid. Many of the
natural occurring wax found in nature are used as ingredients for products
found in stores like ointments, hand cream, and cosmetics.
Plants have
naturally occurring wax on their leaves and stems; these serve as coatings to
prevent them from losing excess water. Other forms of wax found in nature are beeswax,
used by bees to make their cones for honey and eggs; sperm whales have
spermaceti wax found in their blubber; and carnuba wax, is an ingredient
commonly used for car waxes, commonly found in Brazilian palm trees. </span>
