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Leya [2.2K]
2 years ago
8

A bacterial cell makes binary fission many times and 16 calls are produced during two hours.What is the time taken by one binary

fission?
a)30 minutes
b)60 minutes
c)45 minutes
d)20 minutes
Biology
1 answer:
GuDViN [60]2 years ago
6 0

Answer: 20 minutes

Explanation: Binary fission is a very quick way to reproduce. Some bacteria are able to divide themselves up every 20 minutes. A billion bacteria can be produced in this way from one bacterium in just ten hours given the right conditions.

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Assume that the mother's genotype is AZ/az, and the father's genotype is Az/aZ, and the recombination rate is 10%. What are the
Varvara68 [4.7K]

Answer:

.45 from mom, .05 from dad

Explanation:

Given that:

the mother's genotype is AZ/az

i.e AZ = 50%

az = 50%     (parental)

But  we  were also told that the recombination rate is 10% which will like wise affect the mother's genotype

So 100% -10% = 90 % of the mother's genotype

We have a new genotype

AZ = 45%

az = 45% (parental)

Therefore the probability of az gamete from the mother = \frac{45}{100}

= 0.45

Similarly; the genotype of the father is:  Az/aZ

This is an heterozygous father who is diploid hence, there is a remarkable presence of two copies of each autosomal chromosome.

Az is the allele of the genes in one chromosomes and aZ is the allele of the genes in the other.

The gametes of this self cross are: Aa, AZ, az, zZ

Therefore; the recombinants are:

AZ

az

Since there are 10% recombinant; then

AZ = 5%

az = 5%

Therefore the probability of az gamete from the father = \frac{5}{100}

= .05

4 0
4 years ago
The human immunodeficiency virus has been found to be the cause of? aids. paraphilias. refractory periods. an intersex condition
jeyben [28]

The Human Immunodeficiency Virus (HIV) has been discovered to be the cause of AIDS.

AIDS or Acquired Immunodeficiency Syndrome is caused by the Human Immunodeficiency Virus (HIV). HIV is a retrovirus which contains RNA as the genetic material.

HIV infection can be transmitted through:-

  • sexual contact with an infected individual,
  • transfusion of contaminated blood samples,
  • sharing infected needles e.g. in the case of drug addicts who take the drug intravenously,
  • infected pregnant woman to the fetus through placenta.

AIDS adversely affects the immune system of an infected individual. ELISA or enzyme linked immunosorbent assay test is used largely for diagnosing AIDS.

To learn more about AIDS here

brainly.com/question/14295182

#SPJ4

6 0
2 years ago
You are writing a science report and want to find accurate trustworthy information. Which would be the best resource?
Oduvanchick [21]
A encyclopedia a magnize article the science clubs website a newspaper
5 0
3 years ago
Sharks are the top predator in a marine ecosystem. By eating them, sharks maintain a balance in the population of smaller organi
hichkok12 [17]

Answer:

what are the options ??

Explanation:

5 0
3 years ago
The heads of myosin molecules contact the actin filaments when a muscle is relaxed. The heads of myosin molecules contact the ac
julia-pushkina [17]

Answer:The above statement is "false".

Explanation:

The following events take place during contraction-relaxation of a muscle:

•Action potential in T tubule activates voltage-sensitive receptors,which in turn trigger Ca ions release from terminal cisternae of sacroplasmic reticulum(SR) into cystol.

•Ca ions bind to troponin;troponin changes shape,removing the blocking action of tropomyosin;actin active sites is exposed.

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•removal of Ca ions by active transport into the SR after the action potential ends.

•RELAXATION occurs.Actin and myosin return back to its unbound state.

6 0
3 years ago
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