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3 years ago

13

Identify the biotic limiting factor from the choices below. a. space b. vegetation c. water d. climate Please select the best an

swer from the choices provided A B C D

1 answer:

Rashid [163]3 years ago

8 0

Answer:

a

Explanation:

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Why was the sheep domesticated?

nexus9112 [7]

The history of the domesticated sheep goes back to between 11000 and 9000 BC, and the domestication of the wild mouflon in ancient Mesopotamia. Sheep are among the first animals to have been domesticated by humans, and there is evidence of sheep farming in Iranian statuary dating to that time period.

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4 years ago

What is used as evidence to develop a phylogenetic tree?

alexira [117]

A phylogenetic tree is the representation of the evolutionary relationships among species. The fossil records are used as evidence to develop a phylogenetic tree. Thus, option A is correct.

<h3>What is a fossil record?</h3>

A fossil record is a depiction of the organisms that shared common ancestors and depicts the change in the structural and functional unit of the organism over many years of time.

They are used to illustrate the phylogenetic tree to show the morphological, structural, chemical, anatomical, etc variations in species that shared ancestry.

Therefore, option A. fossil records are used to show the common ancestry at the nodes.

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1 year ago

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Liquefaction occurs when _____. large waves wash over coastal areas and destroy structures mud slides swiftly downhill and burie

saw5 [17]

The answer is; saturated soil turns into liquid that can't support buildings

Soil liquefaction occurs mainly in soils saturated, or partially saturated, with water such as in wetlands. During an earthquake, the waves pass through the soil and make it behave like a wave in a fluid. This causes the soil to loosen temporarily and become weak. The foundation of buildings in the soil fail and the structures collapse.

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4 years ago

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Dna fragments that have matching sticky ends are joined by covalent bonds formed by the action of

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DNA Ligase enzyme.

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3 years ago

In the fruit fly Drosophila, there is a dominant gene for normal wings and its recessive allele for vestigial wings. At another

aev [14]

Answer:

15

Explanation:

The genes for vestigial wings (vg) and purple eyes (pr) are linked on the same chromosome.

<u>The following cross was made:</u>

Heterozygous male for both genes X female<em> vg pr / vg pr</em>

The male could be either <em>vg+pr+/vg pr</em> or<em> vg+ pr/vg pr+</em>.

The female only produces <em>vg pr </em>gametes.

<u>The following offspring was observed: </u>

420 Normal wings and red eyes (<em>vg+ pr+/vg pr</em>)

430 Vestigial wings and purple eyes (<em>vg pr / vg pr</em>)

80 Vestigial wings and red eyes (<em>vg pr+ / vg pr</em>)

70 Normal wings and purple eyes (<em>vg+ pr / vg pr</em>)

Total: 1000

The individuals observed in the highest frequency have the parental genotypes. The recombinant individuals are <em>vg pr+ / vg pr</em> and <em>vg+ pr / vg pr.</em>

Distance = Number of recombinants × 100 / Total

Distance = (80 + 70)×100 / 1000

Distance = 15 cM.

<em>Just a small note, male drosophila do not experience crossing over in meiosis, so there would be no recombinants observed from this cross. The problem is probably mixed up, the female should be heterozygous and the male the homozygous recessive.</em>

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3 years ago