Over 400 years ago, the bark of the cinchona tree was discovered to contain a chemical compound called quinine. Quinine was, and still is, used to cure and prevent malaria. This is an early example of ____________________.
a. biotechnology
b. scientific modeling
c. genetic engineering
d. genomics
Answer:
A.
Explanation:
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1. What conditions might cause the most water and sediment to be collected at the bottom of the stream table?
Answer: Steep, high velocity, no silting. The high water speed picks up silt from the bottom instead of letting it settle to the bottom. When the land gets level like often happens at the mouth of rivers where the water spreads out and slows down, silt settles to the bottom and you could get a wide, shallow delta.
(Put in own words this is from online hope it helps)
Compare cladistics with Linnaeus's classification
The law of conservation of energy states that energy cannon be created or destroyed.
O True
O False
Answer:
false
Explanation:
The first law of thermodynamics, also known as Law of Conservation of Energy, states that energy can neither be created nor destroyed; energy can only be transferred or changed from one form to another. For example, turning on a light would seem to produce energy; however, it is electrical energy that is converted.
Hope this helps get an A for me kay!!!
Eutrophication is caused by ___
A. Erosion
B. Pollution
C. High winds
D. Ultraviolet rays
In the 1860s Gregor Mendel performed numerous dihybrid crosses between pea plants. Dihybrid crosses involve the study of the inheritance patterns related to two different traits. In guinea pigs the allele for black fur (B) is dominant over the allele for brown fur (b), and the allele for short fur (F) is dominant over the allele for long fur (f). What percentage of the offspring from a BbFf x bbff cross would be expected to be heterozygous for both traits
Answer:
25% of the progeny is expected to be dihybrid, BbFf, expressing Black and short fur
Explanation:
Available data:
the allele for black fur (B) is dominant over the allele for brown fur (b)the allele for short fur (F) is dominant over the allele for long fur (f)Cross: BbFf x bbffParentals) BbFf x bbff
Phenotypes) Black/Short Brown/Long
Gametes) BF, Bf, bF, bf bf, bf, bf, bf
Punnett square) BF Bf bF bf
bf BbFf Bbff bbFf bbff
bf BbFf Bbff bbFf bbff
bf BbFf Bbff bbFf bbff
bf BbFf Bbff bbFf bbff
F1) 4/16 = 1/4 = 25% of the progeny is expected to be dihybrid, BbFf, expressing Black and short fur
4/16 = 1/4 = 25% of the progeny is expected to be bbFf, expressing Brown and short fur
4/16 = 1/4 = 25% of the progeny is expected to be Bbff, expressing Black and long fur
4/16 = 1/4 = 25% of the progeny is expected to be bbff, expressing Brown and Long fur
Answer:
25%
Explanation:
Because i took the test