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zalisa [80]
3 years ago
10

Which pregnancy-specific structure is responsible for delivering nutrients and oxygen to the fetus and removing waste products?

which pregnancy-specific structure is responsible for delivering nutrients and oxygen to the fetus and removing waste products? blastocyst placenta uterus amniotic fluid?
Biology
1 answer:
Arlecino [84]3 years ago
8 0

Answer:

Blastocyst placenta.

Explanation;

  • During pregnancy the fetus depends on its mother for nourishment and oxygen since it cannot breathe air it's blood circulates differently than it does after birth.
  • Due to the circumstances stated above the mothers womb develops an organ known as the placenta that develops and implants in the mother's womb during pregnancy to provide oxygen and nutrients to the growing baby and remove waste products from the baby's blood
  • The fetus is connected to the placenta by the umbilical cord which contains blood vessels that transport nutrients and oxygen from the mothers blood to the baby and also transports waste products and carbon dioxide from the baby to the placenta and then to the mothers circulatory system to be eliminated.

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Oceanographers use different tools to monitor the changes in oceans.
krok68 [10]
<h3>Three tools Oceanographers use</h3>
  • Thermometer
  • Radar
  • Sonar

<h3>Functions of the tools.</h3>
  • Thermometer helps to measure the temperature of the ocean. Temperature  usually varies according to the season.

  • Radar helps to measure ocean currents and and it works under any type of weather condition.

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Read more about Oceanographers here brainly.com/question/977380

5 0
2 years ago
A genetic carrier is someone who
Nat2105 [25]

Answer:

The correct answer is option B. has a defective allele and normal phenotype.

Explanation:

Genetic carrier or the hereditary carrier is an organism or a person that has a recessive allele for a particular trait or character (generally mutation) but does not exhibit the trait or any character related to the trait.

The carriers are normal in the sex-linked characters in comparison to the autosomal traits. Females are generally the carrier for sex-linked characters and carry the allele to the next generation.

Thus, the correct answer is option B. has a defective allele and normal.

3 0
3 years ago
Explain how an organism's circulatory, digestive, or excretory system helps the organism maintain homeostasis
choli [55]
Circulatory - 
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Digestive -
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Excretory - 
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7 0
2 years ago
State the five requirements for a population to be in Hardy-Weinberg equilibrium.
mihalych1998 [28]

When it comes to population evolution and genetics, we cannot fail to cite the Hardy-Weinberg principle which emphasizes that if evolutionary factors such as natural selection, mutation, migration and genetic oscillation do not act on a particular population, the frequencies genotypic proportions will remain constant.

The five requirements for a population to be in Hardy-Weinberg equilibrium are:

  • Large-scale breeding population: For a population to be in Hardy-Weinberg equilibrium, it is important that this population is large, as small populations favor genetic drift (unanticipated fluctuations in allele frequencies from one generation to another).
  • Random mating: In order for the Hardy-Weinberg equilibrium to occur, it is necessary that the mating occur at random, with no preference for certain groups within the population. In this case, we say that the population is in panmixia, that is, they all mate at random.
  • No mutations: Mutations alter the total alleles present in a population (gene pool). Therefore, in a Hardy-Weinberg equilibrium population, no mutations should occur.
  • No gene flow: When there is gene flow due to migration or immigration of individuals, some genes may be included or excluded from the population. Thus, in an equilibrium situation, no gene flow occurs.
  • Lack of natural selection: For a population to be in Hardy-Weinberg equilibrium, natural selection must not be acting on it. If natural selection acts, some genotypes will be selected, modifying the allelic frequencies of the population.

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How does tuberculosis(tb) evade the human immune system?
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Airborne is the most common.
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