Answer:
a. F. W. Went isolated the chemical substance responsible for
communicating stimulus information- TRUE
b. The chemical substance responsible for communicating stimulus
information is a hormone- TRUE
c.Charles and Francis Darwin confirmed that the tip of a plant stem is
responsible for initiating the phototropic response- TRUE
d.When the tip of a stem is covered with a transparent cap, the stem bends
toward the light source anyway- TRUE
e. When the base of a stem is covered with an opaque shield, the stem
bends away from the light source- FALSE
f. An example of another control mechanism is that some plants require
more than 12 hours of darkness to produce flowers- TRUE
I'm pretty sure it's recessive?
The researcher determines that the S value (number of species at equilibrium) for the island closer to the mainland is higher than the S value for the island located farther from the mainland. In addition, she finds that the closer island's extinction rate is same as the extinction rate on the farther island.
Explanation:
In bio-geographical research of islands, the s-value is the species value of an island ecosystem. This is used to calculate the biodiversity of the island and is dependent on the size of an island and its distance from the mainland.
This is in accordance with the equilibrium theory of island biogeography (ETIB) which states that immigration of species is higher in islands close to mainland and the extinction of species depends on the size of the island; i.e., rate is high in smaller islands and less in larger islands.
In the given case, the researcher is comparing the species value of two islands and concludes that the island near the mainland has a higher species value than the one that is far which correlates with the ETIB theory.
The fact that the extinction rates of the species of both the islands were found to be the same is because both the islands are of the same size, which also correlates with the ETIB theory.
Answer:
40% is Adenine.
Explanation:
In DNA, Guanine pairs with Cytosine and Adenine pairs with Thymine.
If a strand of DNA contains 10% Guanine, that means that it also contains 10% Cytosine.
10% G + 10% C = 20%
100% - 20% = 80% (Adenine and Thymine)
80% ÷ 2 = 40%
The strand of DNA contains 10% Guanine, 10% Cytosine, 40% Adenine, and 40% Thymine.