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Nataliya [291]
2 years ago
9

Which region of the heart supplies oxygenated blood to the aorta?

Biology
2 answers:
irakobra [83]2 years ago
6 0

Answer:

I'm pretty sure it is the left ventricle.

Explanation:

Art [367]2 years ago
4 0
I'm pretty sure it is the left ventricle.
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Enzyme synthesis in a living cell occurs at which cytoplasmic organelles? A) vacuoles B) centrioles C) chromosomes D) ribosomes
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Enzymes are proteins

protein synthesis ocurs in the ribosomes

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2 years ago
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Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I
Bogdan [553]

Answer:

<u>Sister chromatids are identical  forms of chromatids  of a chromosomes. They are mostly  formed by semi-conservative replication of DNA molecule of a single  chromosome.Thus they  are  like  </u><u>'photocopies' </u><u> of  original parent  chromosomes; joined together at the Centromere</u>.

They are exactly similar in all ramification; with the same gene and allele compositions..

<u>However; slight differences  arise between the two identical sisters due to  </u><u>mutation</u><u> from</u><u> errors </u><u>at replication;and also in  the  length of telomere repeats.</u>

Non-sister chromatids are dissimilar forms of  chromatids of a chromosomes formed  when each half of  a chromosome  at fertilisation from separate   haploid sex-cells, of each parent. fused.They contain different genetic composition;because  they are not on the same homologous chromosomes.Therefore crossing -over ensure variation.

<u>However, they are genetically  similar in composition; if they  are contained in homologous chromosomes</u>. This is because Synapsis of bivalent of these chromosomes allow genetic material to be shared by  chromosomal crossing-over between the non-sister chromatids  on the chromosomes ; therefore identical genetic characteristics are shared .

Explanation:

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3 years ago
A cross was made between a white male dog and two different black females. the first female gave birth to eight black pups, and
Svetradugi [14.3K]

In this case, the black body colour is the dominant one. The white dog is  homozygous recessive.

As the cross between the black female 2 and the white male results in all black pups. This means that the all the offsprings are heterozygotes and the Female 1 is homozygous recessive having a BB phenotype (where B codes for dominant allele).

As the cross between the black female and the white male results in four white and three black pups. This means that the all the black offsprings are heterozygotes, and the white ones are homozygous recessive and the Female 2 have a dominant and 1 recessive gene, and is a hetrozygotezygous recessive having a Bb phenotype (where B codes for dominant allele and b codes for recessive allele).

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2 years ago
Which of the following would be the greatest cause of mechanical weathering? oxygen the hot sun tree roots growing in rock acids
Yanka [14]
Tree roots<em> dfhgjhkjl
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7 0
3 years ago
If one trait covers up one we say that it is ____ the other one that is cover-up is _____
Morgarella [4.7K]

Answer:

i). Dominant Allele.

ii). Recessive Allele

Explanation:

A dominant allele completely dictates the appearance or phenotype of heterozygotes. One allele is said to be dominant over another if a heterozygous individual bearing the allele has the same appearance as an individual who is homozygous for it.

A recessive allele is one who phenotypic expression is completely masked in heterozygotes by the presence of a dominant allele.

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