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s344n2d4d5 [400]
4 years ago
11

Cattle and sheep are exposed to lead and zinc when these poisons are in the _____.

Biology
2 answers:
pentagon [3]4 years ago
7 0

Answer:

Option D, grass they eat and water they drink

Explanation:

Most of the grazing animals including buffaloes, cows, and sheep have high level of lead and zinc in their blood or milk only when -

a) They graze is any farmland or grass land which is near to any lead/zinc smelter or factories that uses these two chemicals.

b) Or when these animals drink water from water bodies contaminated by lead or zinc released by industries.

Hence, option D is correct.

postnew [5]4 years ago
6 0
<span>D. grass they eat and water they drink</span>
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Briefly explain why only chromosomes of a homologous pair can have their alleles referred toas homozygous or heterozygous
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This is due to the fact that only homologous chromosomes would have identical genes located at identical sites on those chromosomes. Otherwise, there would be no connection between the alleles of various genes.

Although the genes and loci of the two members of the homologous pair are similar, the alleles may vary.For instance, both allele possess the genes responsible for the attribute of eye colour. While the one has alleles for the blue-eye trait, other has alleles for the brown-eye trait. The homologous chromosomes are said to be heterozygous in this instance since the alleles are different.

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2 years ago
What element is found in the nuclear reactor core?
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a graphite neutron moderator

6 0
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What is one way that calcitonin and parathyroid hormone maintain homeostasis
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5 0
3 years ago
Place the following materials in the order in which they are likely to fossilize. Begin with the material that is most likely to
marusya05 [52]

Answer: correct order--->

1)mammal teeth

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Explanation:

Fossilization is the ability of an organism to be preserved and remain unaltered for a very long time. Through research , it has been found out that Harder  parts of the body tend to remain preserved for a long time  because they  naturally have minerals deposited in them and may only be reduced,  but the softer part or tissues do not get preserved for a long time because being made up of polymer can be disintegrated easily by natural biological and physical processes.

The order of which material will likely fossilize is

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3.) bones of an adult mammal left on the surface

4.)soft body parts of any animals

Reason,

--Teeth and bones biologically contain calcium but the teeth is more tougher and durable than the bone, Even when a  body is decomposed, the teeth most times are not  affected at all.

Bones of an adult mammal left on the surface will decompose faster than the one buried because of the biological (natural decomposing ) and physical processes(temperature, wind, sunglight, rainfall ) which will both act on it at the same time because of its exposure.

- soft body parts of any animals will decompose fastest as bacteria will feed on it immediately since it lacks minerals that can elongate preservation.

5 0
4 years ago
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