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gogolik [260]
3 years ago
12

Renee, pregnant for the first time, wonders how the developing organism receives nutrients and oxygen and rids itself of waste.

this principal organ of exchange between the mother and the developing organism is the ______.
Biology
2 answers:
yKpoI14uk [10]3 years ago
6 0

The principal organ of exchange between the mother and the developing organism is the placenta.

notsponge [240]3 years ago
3 0

Answer:

Placenta

Explanation:

The product of fertilization in sexually-reproducing organisms like humans is the ZYGOTE which develops into embryo and gets implanted in the uterus/womb of the female where it undergoes growth. The uterus of a female is designed to cater for the developing foetus's needs e.g nutrients, excretion, etc as mentioned in the question.

Renee, being pregnant for the first time wonders how this happens. It occurs through an organ unique to mammals called PLACENTA. Placenta serves as a connection point between the mother and the fetus. The placenta helps the mother to internally pass usable nutrients and oxygen to the fetus and also transfer waste products from the fetus to the mother's blood. Since, the fetus cannot yet derive these life-dependent substances itself, the mother transfers them to it through the placenta.

Therefore, Reene need not wonder because the placenta in her uterus helps do the job.

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Lera25 [3.4K]

The mix of alleles from various genes that end up in the daughter cells is determined by the anaphase 1 of meiosis 1.

Chromosome segregation during meiosis is mirrored in the segregation of alleles. During anaphase, 1 of meiosis 1 homologous chromosomal separation leads to allele segregation.

Chromosomes display autonomous assortment when they are randomly split into daughter cells during meiosis.

<h3>What takes place in anaphase 1?</h3>

During meiosis I, sister chromatids remain together as homologous chromosomes separate. To appreciate the development of germ cells, it is crucial to comprehend how this odd chromosomal segregation behavior came to be. Here, we show that the pattern of chromosomal segregation during meiosis I is determined by the microtubule-kinetochore interactions that are inhibited during prophase I and the premeiotic S phase.

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7 0
9 months ago
"passive refilling of the heart occurs during which phase of the cardiac cycle?"
Oksanka [162]
Hey! here is your answer

passive refilling of the heart occurs During ventricular systole, the blood pressure 
3 0
3 years ago
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Why do scientists dispute the claim that the Loch Ness monster is a real creature?​
Sauron [17]

Explanation:

Scientist disputes the claim that the Loch Ness monster exists beyond folklore because no one has truly seen them. Loch Ness monster in Scottish folklore is a monster that resides in the Scottish highlands in Scotland.

Scientists follow methods to substantiate a claim. A body of evidence must be available to justify an observation in the scientific realm.

No clearcut picture of the monster has been taken.

The monster is merely a folklore myth just like dragons.

Science does not work with hearsay and claims that cannot be substantiated and proven.

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6 0
3 years ago
When mutations exhibit complementation this means the mutations are located:
Wewaii [24]

Answer:

The correct option is: b. in the different genes

Explanation:

In an organism, complementation is observed when the two strains with the different homozygous recessive mutations are mated or crossed to produce an offspring having wild-type phenotype.

<u>Complementation is observed when the mutations are present in different genes.</u>

<u>Therefore, mutations are said to be</u><u> complementary, </u><u>if they are present in different genes.</u>

5 0
3 years ago
The notion that the traits that help a species survive and reproduce are passed along more frequently than those that do not (i.
beks73 [17]

Answer:

Natural selection

Explanation:

According to  Darwin's theory, natural selection is the process by which individuals better adapted to their environments have more chances to survive and reproduce, and thereby their descendants will be better represented in the next generation. This mechanism exploits the existence of natural variation among members in the population which is used to select those individuals that are better adapted (i.e., with a higher adaptive fitness) for their environments. Natural selection is a key mechanism of evolution by which species change across time.

3 0
3 years ago
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