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NNADVOKAT [17]
3 years ago
6

There are various hypotheses as to the origin of prokaryotic and eukaryotic cells. Because all cells are similar in nature, it i

s thought that all cells came from a common ancestor cell called the last universal common ancestor or LUCA. The LUCAs evolved into three different cell types, each representing a domain in the modern system of classification. The three domains are the Archaea, the Bacteria, and the Eukarya. We know that all three domains are cellular in nature, but they have one other feature in common. And this second common feature helped provide the biochemical evidence to support this newest step in classification. Cite the evidence utilized in this classification scheme.
Biology
2 answers:
Paha777 [63]3 years ago
7 0

Answer:

D

Explanation:

Organisms can be classified into one of three domains based on differences in the sequences of nucleotides in the cell's ribosomal RNAs.

RSB [31]3 years ago
4 0

Answer: D

Explanation: took the usatestprep quiz

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What would happen if s-phase did not occur before mitosis?
Alexandra [31]
<span>S phase is the duplication of the cells genetic information, if this did not occur, when the cell divides into two cells, there would be no copy of this genetic information given to 1 out of the 2 cells.

</span>
8 0
3 years ago
Which of the following sequences describes the general life cycle of a eukaryotic organism? a. 1N meiosis 2N fertilization 1N b.
ehidna [41]

Answer:

b. 2N meiosis 1N fertilization 2N

Explanation:

In eukaryotic organisms, gamete mother cells are diploid (2N) and have two complete sets of chromosomes. Meiosis in male and female gamete mother cells form haploid male and female gametes (N) respectively. This occurs since meiosis reduces the number of the chromosome to half in the daughter cells. The fusion of haploid male and female gametes during fertilization restores the diploid chromosome number of the species and forms diploid zygote (2N). Repeated mitotic divisions in the diploid zygote form the diploid organism.

7 0
3 years ago
Carlos is a healthy but sedentary college student. he weighs 175 pounds. about how many grams of protein should he consume each
MatroZZZ [7]
Carlos will have to consume about 63 gram of protein per day.
The dietary reference intake of protein is 0.8 gram of protein per kilogram body weight or 0.36 gram per pound. Carlos is 175 pounds in weight, so he is going to need 0.36 * 175 = 63. Thus, Carlos needs 63 grams of protein per day.<span />
6 0
3 years ago
When a sudden change in the environment, such as a flood or fire, reduces the size of a population, the survivors' collective ge
maksim [4K]

Answer: option A - bottleneck effect

Explanation:

Whenever sudden change caused by human or natural disasters occurs in the environment leading to the reduction of organisms or biodiversity present to a lower size, such condition is referred to as BOTTLENECK EFFECT.

3 0
3 years ago
The force for glomerular filtration is the select one:
salantis [7]

Answer;

Blood pressure in the glomerular capillaries.

Explanation;

-The glomerulus is a tuft of small blood vessels called capillaries located within Bowman's capsule within the kidney.

-The process by which glomerular filtration occurs is called renal ultrafiltration. The force of hydrostatic pressure in the glomerulus (the force of pressure exerted from the pressure of the blood vessel itself) is the driving force that pushes filtrate out of the capillaries and into the slits in the nephron.

7 0
3 years ago
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