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3 years ago

Why did the five-kingdom system of classification fall out of favor?

Biology

1 answer:

LenKa [72]3 years ago

3 0

Answer:

Answer is B. It did not reflect the actual evolutionary relationships among organisms very well.

Explanation:

The five-kingdom system of classification was initiated or formed by Robert H. Whittaker in 1969. And it involved the Kingdoms monera, fungi, protista, animalia and plantae.

This classification system was regarded as not so good because of placement of some certain organisms. For example, in the classification system, unicellular algae were put under the kingdom protista, when other multicellular organisms like algae were being classified under the kingdom Plantae.

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n cattle, an autosomal mutation called Dexter produces calves with short stature and short limbs. Embryos that are homozygous fo

timofeeve [1]

Answer:

1 DDRR - Red, non-dexter

2 DDRr - Roan, non-dexter

2 DdRR - Red, dexter

4 DdRr - Roan, dexter

1 DDrr - white, non-dexter

2 Ddrr - white, dexter

Explanation:

Dexter is deleterious in homozygous condition, hence, phenotypes are heterozygous.

Roan are also heterozygous.

If dexter allele is represented by D, non dexter individuals will be DD dexter individuals will have the genotype Dd.

If colour in cattle is represented by R, red individuals will be RR, white will be rr, then roan colour will be Rr.

Hence, roan dexter cow and roan dexter bull will both have DdRr genotypes.

Crossing the two: DdRr x DdRr

Progeny:

1 DDRR - Red, non-dexter

2 DDRr - Roan, non-dexter

2 DdRR - Red, dexter

4 DdRr - Roan, dexter

1 DDrr - white, non-dexter

2 Ddrr - white, dexter

Others that are either aborted or stillbirths include:

1 ddRR

2 ddRr

1 ddrr

5 0

3 years ago

A solution of ph6 contains __________ h+ than the same amount of a solution of ph8

Sholpan [36]

Answer:

A solution at pH 6 contains 100 times more H+ than the same amount of solution at pH 8.

Explanation:

pH of a substance determines the hydrogen ion concentration of a solution. Acidic solution tend to have a higher concentration of H+ ions as compared to that of water. They have a concentration greater than 1 × 10^{-7} M. Basic solutions have lesser concentration of H+ ions as compared to that of water. They have a concentration lesser than 1 × 10^{-7} M. A solution from pH range 1 to 6 will be acidic. A solution from pH rage 8-10 will be basic.

8 0

4 years ago

What is meiosis? How many cells are produced? What are the cells called ?

zlopas [31]

A type of Cell division that results in four daughter cells each with half the number of chromosomes of the parents cells as in production of gametes and plant spores.

8 0

4 years ago

. Meselson and Stahl grew cells in media that contained different isotopes of nitrogen (15N or 14N) so that the DNA molecules pr

vlabodo [156]

Answer:

a. The apparatus that was used to distinguish heavy DNA from the light ones were the centrifuge tubes. The samples of DNA gathered are placed in the centrifuge tubes comprising cesium chloride. The light and the heavy DNA get distinguished on the basis of density after performing high-speed centrifugation for the duration of two days.

b. At the time of the beginning of the study, the three prevailing models for the replication of DNA were conservative, semi-conservative, and dispersive. According to the conservative model, the original parent strands remained in combination post replication, and the daughter duplex is formed of newly produced DNA.

On the basis of the semi-conservative model, the two DNA duplexes formed at the time of replication exhibits one of the parental strands and one newly produced strand. While on the basis of dispersive model, the two new DNA duplexes comprise segments of parental and daughter strands.

c. The conservative model for the replication of DNA was ruled out definitively by performing density gradient experiments.

d. The dispersive model was discarded by using heat to denature the DNA duplex, and by comparing the densities of the single-stranded DNAs. If this model was accurate then the strands would have exhibited intermediate density.

8 0

4 years ago

3 किसी धन का भाग 330 रु० के बराबर है, तो धन का मूल्य निकालिये। 11

Alecsey [184]

Answer:?

Explanation:

6 0

3 years ago