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I am Lyosha [343]
3 years ago
9

Scientists studied a flock of tundra swans that spent the winter along rivers in virginia. the swans migrate in the spring to ot

her locations. what would be the best way for scientists to distinguish between the birds they study in virginia and flocks in the summer location?
Biology
1 answer:
Vadim26 [7]3 years ago
4 0

Capturing and putting coded bands on the birds in Virginia, then recording the bands seen on birds in the summer location would be the best way for scientists to distinguish between the birds they study in Virginia and flocks in the summer location.

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A mite is a tiny organism that may "ride" on top of an insect such as a beetle in order to move quickly from place to place.
Whitepunk [10]

Answer: the beetle is neither harmed nor helped by the mite.

Explanation:In this case, the mite benefits because it gains transportation from the beetle. If the beetle is neither harmed nor helped by the mite, then the relationship between the mite and the beetle would be an example of commercialism.

5 0
3 years ago
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Influenza is capable of genetic reassortment in which genetic components from two influenza strains reassort between themselves.
tester [92]

Answer:

The correct answer is - option B. ducks and swine.

Explanation:

Influenza virus is capable of the genetic reassortment. This reassortment involves the reassortment of genetic parts in between two influenza strain. This takes place due to the ability of influenza virus to alter or modify the structure of Hemagglutinin (HA) and neuraminidase.

Some other characters also helps them to develop different strains for different host such as mutation, antigenic drift and many other conditions. Influenza virus subtype A are belongs to the avian host so they affect the birds such as duck, swan, gesse. Other than avian variants there is another strain that affect pigs known as swan variants. These strains are virulent if reassorted with human strains.

Thus, the correct answer is - option B.

6 0
3 years ago
which type of bond forms between an anion and a cation? A. nonpolar covalent B. ionic. C. polar covalent. D. hydrogen
Umnica [9.8K]

Ionic forms between an anion and a cation.

6 0
3 years ago
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The human MN blood type is determined by two codominant alleles, L(M) and L(N). The frequency of L(M) in Eskimos on a small Arct
tatiyna

Answer:

(a) Frequency of M = 0.64

    Frequency of N = 0.04

    Frequency of MN= 0.32

(b)  Expected frequencies of M = 0.648

     Expected frequencies of MN = 0.304

     Expected frequencies of N =  0.048

Explanation:

(a) If random mating takes place in the population, then  the expected frequencies are

f(L(M)) = p = 0.8

F(L(N)) = q

q= 1 - p

= 1 - 0.8

= 0.2

Frequency of M = p^2 = ( 0.8)^2 = 0.64

Frequency of N = q^2 = (1-p)^2 = (1 - 0.8)^2 = (0.2)^2 = 0.04

Frequency of MN = 2pq = 2 * 0.8 * 0.2 = 0.32

(b)

F = inbreeding coefficient = 0.05

f(L(M)L(M)) = p^2 + Fpq = (0.8)^2 + 0.05 * 0.8 * 0.2 = 0.648

f(L(M)L(N)) = 2 pq - 2Fpq = 2 * 0.8 * 0.2 - ( 2 * 0.05 * 0.8 * 0.2) = 0.304

f(L(N)L(N)) = q^2 + Fpq = (0.2)^2 + ( 0.05 * 0.8 * 0.2) = 0.048

5 0
3 years ago
Describe how food travels through the digestive system.
Ainat [17]
<span>Hi,
The food is chewed and grinned up from the teeth and broken down from saliva, then the epiglottis shuts covering the trachea allowing food to travel
down the esophagus, once it travels down it reaches the stomach which is mechanically and chemically broken down from the stomach muscles and the hydrochloric acid. Then it goes into small intestine, then the large intestine where it is determined to be a solid, liquid, or gas and the liquid is normally drained out causing it to be solid, Then it is eventually stored in the rectum and released through the anus. There are three helping organs the liver, gallbladder, and pancreas which produce the digestive enzymes but arent part of the digestive tract,

Hoped I Helped</span>
4 0
3 years ago
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