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tresset_1 [31]
3 years ago
8

The archaebacteria kingdom has been on earth for at least ________ years.

Biology
1 answer:
nata0808 [166]3 years ago
6 0

Answer:

Archaea are found in the harshest environments on Earth, and are the oldest known organisms on Earth, appearing in the fossil record over 3.6 BILLION years ago

Explanation:

Hope this helps!

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George on one pair of his chromosomes has STRs of lengths 6 and 7, Stephen (his father) STRs of lengths 3 and 6, and Mary (his m
JulijaS [17]

Answer:

Stephen is not his biological father.

Explanation:

DNA fingerprinting is a technique use to determine the DNA sequence of an individual organism. Short tandem repeats are unique among the individuals ans used to identify the individual in population.

The George DNA fingerprinting shows that he has STRs length of 6 and 7. Stephen's STRs does not match with his son George whereas Mary shows some similarities with George STRs. This indicates that Stephen is not the biological father of George because the biological father's STRs must match with the children STRs.

Thus, the correct answer is option (a).

4 0
4 years ago
Why does sexual reproduction produce offspring with characteristics that are different from their parents, where as offsprings p
Gnesinka [82]
They are different because one is stronger than the other
8 0
4 years ago
1. Gametes are formed by.. (1 point)
777dan777 [17]
Hello

Gametes are formed after the cell reproduction process mitosis.

Hope this helps
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7 0
3 years ago
Read 2 more answers
Population A consists of 100 hens that are fully isogenic and that are reared in a uniform environment. The average weight of th
qaws [65]

Answer:

a. the environmental variance (VE) = 3.5 g ²

b. 17.5 g ² for population

c. the heritability of broad sense (H2) = 0.83

Explanation:

a.With the information we have we can infer that environmental factors influence A, which is considered isogenic, thus, the environmental variance (VE) = 3.5 g ²

b.When studying population B, comparing it without environmental changes with respect to population A, we found that its total variance (VT) = 21.0g ²

We generate the following formula with the data obtained previously to find the genetic variation

VT = VE + VG

then VG = VT-VE

replacing data:

VG = 21.0 - 3.5 = 17.5 g ² for population

c. Regarding the heritability of broad sense (H2) in population B, we can reach the result with the data previously obtained like this:

H2 = VG / VT = 17.5 / 21.0 = 0.83

7 0
3 years ago
Feral cats kill large numbers of native wildlife in Australia. Which technology would allow environmental scientists to know the
denis23 [38]
The correct answer is A.
In order to keep track of the feral cats' location, the animals should have a GPS tag that can be monitored. After the animal has been tagged and released, the scientists can track the movement of the animal and know its exact location at all times.
8 0
4 years ago
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