Answer:
D. Type II alveolar cells
Explanation:
Three layers together make the diffusion membrane or respiratory membrane, which make the total thickness of less than a millimeter i.e. about 0.2 micrometer. The three layers are as follows:
1. The squamous epithelium of alveoli. There are two types of alveolar cells called type I and type II. Type I makes the exchange surface of alveolar membrane and type II cells are responsible for secreting the lung surfactant that reduces the surface tension.
2. Endothelial lining of blood capillaries. These is rich network of blood capillaries near the wall of alveoli.
3. In between the squamous epithelium and the endothelium of blood capillaries fused basement membrane is present.
Gametes of the parents would be:
PpTt : PT ; Pt ; pT ; pt
Pptt : Pt ; Pt; pt ; pt
You can do this easily using the FOIL method on each genotype. Just like in math, F stands for first; O stands for outside; I stands for inside; and L stands for last. I'll do one parent genotype and maybe you will understand how this was done:
GENOTYPE: <em>PpTt</em>
<em>F- </em><em>irst of each pair. P and T</em>
P p T t
Gamete: <em>PT</em>
<em>O </em><em>- utside allele of the pair. P and t</em>
P p T t
Gamete: Pt
<em>I - </em><em>inside alleles of the pair. p and T</em>
P p T t
Gamete: pT
<em>L</em><em>-ast or end allele of each pair. p and t</em>
P p T t
Gamete: pt
Answer:
d. maintains all reactions in a pathway near the equilibrium of each.
Explanation:
In living organisms, control processes similar to the control processes used in technology take place in a purely formal way, one can look at living beings as cyber machines. Governance and regulation are fundamental principles of the organization of the living. According to the type of signal or transmission of information, four different types of biological control processes are distinguished:
- Neural
- Hormonal
- Differential gene expression in which substrate or substrate-like effectors are signaling agents.
- Feedback and forward control mechanisms in which the metabolites themselves act as direct signals to control their own degradation or their own synthesis.
Explanation:
whales, elephants, cows, they are consumers
tree,grass,algae are producers
With the development of the heliocentric model<span> by Nicolas Copernicus in the 16th century, the sun was believed to be the </span>center<span> of the </span>Universe<span>, with the planets (including </span>Earth<span>) and stars orbiting it.</span>
