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3 years ago

In what ways are the daughter cells similar to the parent cells

1 answer:

7 0

During both meiosis I and meiosis II, cells undergo the same phases found in mitosis, but the processes and results are different. Within meiosis I, homologous chromosomes become paired and crossing over occurs. Homologous pairs are separated, and the two resulting daughter cells have half as many chromosomes per cell.

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Can you identify the supergroups to which these protists belong?

uranmaximum [27]

Protists and Supergroups

Diatoms – SAR - Stramenopila

Foraminiferans – SAR - Rhizaria

Plasmodial slime molds - Unikonta - Amoebazoans

Trichomonas vaginalis - Excavata - Parabasalids

Giardia intestinalis - Excavata - Diplomonads

Dinoflagellates - SAR - Alveolata

Green algae - Archaeplastida- Chlorophytes

Brown algae - SAR-Stramenopila

Explanation:

Protists are the simplest eukaryotes. Due to their vast diversity of species, they are broadly divided into four supergroups or the clades. They are the Archaeplastida, Excavata, SAR clade, and Unikonta.

Archaeplastida: Interrelated with DNA sequence, cell structure, and endosymbiotic relationships. Divided into red algae, chlorophytes, charophyceans, and the plants. Eg, red algae, green algae, plants.

Excavata: Protists with cytoskeletal features like excavated grooves. This clade includes diplomonads, parabasalids, euglenozoans. Eg., Trichomonas and Giardia species

SAR: Protists interrelated with their DNA sequences and endosymbiotic relationships. Further divided into alveolata, stramenopila, and rhizaria. Eg., diatoms, dinoflagellates

Unikonta: Protists with flagella like structures, pseudopodia, genes fused together. Divided into amoebozoans and opisthokonts. These include slime molds, fungi, entamoebas, animals etc.

5 0

3 years ago

What is the role of mitosis in regenerating tissue

Tatiana [17]

Answer:

Replacement and regeneration of new cells- Regeneration and replacement of worn-out and damaged tissues is a very important function of mitosis in living organisms. Mitosis helps in the production of identical copies of cells and thus helps in repairing the damaged tissue or replacing the worn-out cells.

Explanation:

4 0

3 years ago

After inoculation and incubation of a Phenol Red Glucose tube, you will most likely to have a gas bubble trapped in durham tube

Ad libitum [116K]

What- ......................................

8 0

3 years ago

Suppose the human trait for freckles is controlled by a simple dominant and recessive relationship at one locus. Freckles, F, is

Dennis_Churaev [7]

Answer:

0.549 is the frequency of the F allele.

0.495 is the frequency of the Ff genotype.

Explanation:

FF or Ff genotypes determine freckles, ff determines lack of freckels.

In this class of 123 students, 98 have freckles (and 123-98= 25 do not).

If the class is in Hardy-Weinberg equilibrium for this trait, then the genotypic frequency of the ff genotype is:

q²= 25/123

q²=0.203

q= $\sqrt{0.2$

q= 0.451

q is the frequency of the recessive f allele.

Given p the frequency of the dominant F allele, we know that:

p+q=1, therefore p=1-q

p=0.549 is the frequency of the F allele.

The frequency of the Ff genotype is 2pq. Therefore:

2pq=2×0.549×0.451

2pq=0.495 is the frequency of the Ff genotype.

5 0

3 years ago

A viral hepatitis screen with positive hepatitis B surface antigen (HBsAg) should be interpreted as ________ hepatitis B

Nostrana [21]

Answer:

Acute.

Explanation:

Viral hepatitis may be defined as the virus that causes inflammation in the lung and causes swelling in the injured tissue and the lung. Five different hepatitis virus are A,B,C,D and E.

The acute hepatitis virus quality is shown by all the types of the virus strain. In the acute form, the surface antigen is similar with the virus strain. While sowing the positive screen testing, the virus that shows the similar antigenic strain can be considered as acute virus.

Thus, the answer is acute.

7 0

3 years ago