Gametes are haploid cells, and each cell carries only one copy of each chromosome. These reproductive cells are produced through a type of cell division called meiosis. ... These cells develop into sperm or ova. The ova mature in the ovaries of females, and the sperm develop in the testes of males.
Answer:
Gametes are produced by Mitosis (not meiosis) and after fertilization a diploid zygote is created. The single zygote cell never grows or divides my mitosis. It can only divide by meiosis to produce haploid cells once more, which then produce the main adult body.
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Organisms of either extreme characteristic dying out while organisms with the medium characteristic have a higher fitness is identified as?
Answer: Stabilization selection
Explanation:
Natural selection involves the differential survival and growth of organisms which have suitable traits to survive in unfavorable or adverse environment. Such traits are passed on to the next generation. Stabilization selection is a type of natural selection in which the nature selects the non-extreme phenotypic traits. Middle traits are selected and such organisms grow and reproduce. Example can be given that of human babies in which babies with low weight lose more heat and babies with high weight are difficult to be delivered from the pelvis. Therefore, babies with middle weight are expected to survive more than that of low or middle weight.
Cuando se excita una neurona con estímulos de intensidad creciente se obtiene, a partir del umbral, la misma respuesta eléctrica. En esta situación se pone de manifiesto la característica de: *
A) ley del todo o nada.
B) período refractario relativo.
C) período refractario absoluto.
D) excitabilidad.
E) umbral de excitación.
Answer:
d) excitabilidad
Explanation:
creo que seria esa no lo sé
no se mucho de eso
me dices si sale buena o mala
in your own words, write the definition for Ribosomes (what does it do and what type of RNA is it made of?)
Answer:
Ribosomes are structures made of rRNA and proteins. They are the site of protein synthesis (where mRNA and tRNA meet).
Explanation:
why is carbon dioxide required for photosynthesis
Answer:
Carbon dioxide is necessary for photosynthesis because plants make their food only in the presence of carbon dioxide
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Answer:
“Hard limits” to population growth are things like food, water, energy, technology, living space, other basic needs and economic factors which limit people’s ability to access these things.
“Soft limits” to population growth are things like education, birth control, the desire for a better life individually and a better global future for humanity, religious celibacy or chastity or abstinence, female empowerment and economic participation, the suffering already caused by overpopulation and the desire to avoid further suffering, malnutrition or non-lethal starvation which reduces sexual libido, pollution and other man made causes of involuntary sterility or low sperm count or low fertility, desire to save the environment, aversion to pain and suffering when understood that population growth causes both.
Countries with better quality of life and access to food and basic needs often have lower birth rates and lower population growth. This shows that soft limits can actually be more effective than hard limits to stop population growth. You have plenty of countries in Africa running into hard limits and having some of the highest fertility and population growth rates at the same time. They also suffer massive problems like war, poverty, disease and low standard of living. This goes to show that running into the hard limits will pretty much let things get as bad as they can get before it stops population growth. The hard limits won’t stop all the suffering caused by overpopulation but will make enough people suffer TO DEATH that the population doesn’t grow. People fear pain, thus the soft limits are more effective when they understand that population growth was responsible for pain or suffering and avoid it.
how the animals and plants of a healthy ecosystem are organized and interact.
Answer:
A healthy ecosystem consists of native plant and animal populations interacting in balance with each other and nonliving things (for example, water and rocks). ... Decomposers break down dead plants and animals, returning vital nutrients to the soil. Plants take up these nutrients, along with water, through their roots.
Explanation:
Biology - Genetics
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Answer:
what type of question it is
How are glaciations related to Earth's position in a Milankovitch cycle
Answer:
The Milankovitch Theory explains the 3 cyclical changes in Earth's orbit and tilt that cause the climate fluctuations occurring over tens of thousands of years to hundreds of thousands of years. ... When the orbit is more elliptical, glaciation is affected by the time of year (season) that Earth is closest to the sun.
Explanation:
A man is HH for a trait, while his wife is hh. What will their children
Explanation:
I hope what I have drawn on the picture will help you understand:)
If fertilization occurs which hormone triggers the thickening of the endometrium
a.estrogen
b.progesterone
Answer: B. Progesterone
Explanation: trust me;)
A 38-year-old mother of three presents to her primary care office with complaints of fatigue. She feels that her energy level has been low for the past 3 months. She was previously healthy and taking no medications. She does report that she has gained about 10 lb and has severe constipation, for which she has been taking a number of laxatives. A TSH is elevated at 25 mU/L. Free T4 is low. She is wondering why she has hypothyroidism. Which of the following tests is most likely to diagnose the etiology?
A. Antithyroid peroxidase antibody
B. Antithyroglobulin antibody
C. Radioiodine uptake scan
D. Serum thyroglobulin level
E. Thyroid ultrasound
Answer:
A. Antithyroid peroxidase antibody
Explanation:
The most common cause of hypothyroidism is autoimmune thyroiditis, also known as chronic lymphocytic thyroiditis or Hashimoto's disease. This condition (autoimmune thyroiditis) is caused by damage of the thyroid gland, which occurs when antibodies of the immune system attack this gland. The thyroid peroxidase test is an enzyme immunoassay widely used to measure the level of autoantibodies against thyroid peroxidase. Patients with chronic thyroiditis often display a positive thyroid peroxidase test. On the other hand, thyroid ultrasound is useful for the initial evaluation of painless thyroiditis in order to distinguish nodules or multinodular goiter. Antithyroid peroxidase antibodies are commonly observed in individuals suffering autoimmune thyroiditis, whereas antithyroglobulin antibodies are observed in different thyroid disorders and autoimmune diseases. Finally, a radioiodine uptake scan measures the amount of radioactive iodine accumulated in the thyroid gland, which is useful only for diagnosing early‐stage of Hashimoto's thyroiditis.
Which of the following is one way that humans can protect biodiversity?
Explain the four main principles of natural selection
Answer:
Reproduction: Individuals mate to produce the next generation.
Individual variation: Individuals differ in various characteristics.
Different needs: What helps one survive does not always help another.
Resource competition: There are limited resources desired by other individuals and species.
Explanation:
Answer soon a possible please!
Bacteria in the soil can release____
back into the air
-oxygen
-hydrogen
-nitrogen
-carbon dioxide
Answer:
Explanation:
nitrogen
Answer:
nitrogen
Explanation:
What is the purpose of the digestive system?
1. Create energy
2. Swallow food
3. Break down food so nutrients can be absorbed
Answer:
3. Break down food so nutrients can be absorbed
Explanation:
the reasoning is when you digest something your body is breaking down the food into small chuncks so that the nutrients can be absorbed easier
1. In 1970, the U.S. Congress established The Environmental Protection Agency (EPA) to oversee all of the following, EXCEPT: *
A.pollution problems
B.building new nuclear power plants
C.establish new environmental policies
D.research solutions to environmental issues
Answer:
B
Explanation:
What Are Alleles? Where Do alleles come from?
Answer:
An allele is one of two more versions of a gene. An individual inherits two alleles for each gene,one for each parent.
Explanation:
Part-1
An allele is a variant form of a gene. Though the term allele was originally used to describe variation among genes, it now also refers to variation among non-coding DNA sequences.
For example: an allele is the gene that determines hair color.
Part-2
One allele for every gene in an organism is inherited from each of that organism's parents.
Learn more:
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Answer: i think the answer c
Explanation:
For recessive trait to be expressed you need to receive the allele from both parents. True or false
Answer:
When a trait is recessive, an individual must have two copies of a recessive allele to express the trait.
A third-level consumer must be which type?
Carnivore
Herbivore
Producer
Decomposer
Answer:
i think answer is producer
____________________________ is the process in which humans chose the desired traits of an organism.
a
Artificial selection
b
Natural selection
c
Biology
d
Variation
his plant likes to grow in an upward direction and will often grow on other plants. Due to its length it must have a way to hold on as it grows so it does not fall.
Describe the scales that scientists use to measure the magnitude of an earthquake
Answer:
the ritcher scale the mercalli scale magnitude scale
The female gametes are called__________. *
sperm
ova
Answer:
Woman's gametes are called Ova. Sperm is what a mans gamete is.
Explanation:
Como se chama a transferencia de enrgia termica flui de um corpo com maior temperatura quando ao outro de menor temperatura quando ha diferença de temperatura entre ambos
Answer:
Conduction.
Explanation:
Conduction is the process in which heat energy is transferred from the hotter body towards colder body because of temperature difference between two bodies. Conduction occurs only due to physical contact between two bodies. In the conduction process, the thermal energy flows from a body with a higher temperature to the other body having lower temperature until both bodies having same temperature.
Assuming that the Earth has a gravity of 1 and Jupiter has a gravity of 2.9, what would your weight be on Earth if you weighed 300 lbs on Jupiter?
Answer:
300/2.9 = x/1
300*1 = 2.9x
300 = 2.9x
103.448275862 lbs = x
Explanation:
Which of the following best describes what carrying capacity is?
A
The quantity of marine life a limited water resource can sustain.
B
The maximum number of a population that an ecosystem can sustain.
C
The total amount of greenhouse gases a specific ecosystem can sustain.
D
The minimum number of predators a specific geographic area needs to sustain itself.
B. The maximum number of a population that an ecosystem can sustain.
Mendel based his conclusions on his understanding of meiosis.
a. FALSE
b. TRUE
True or false, DNA contains the nitrogenous bases adenine , uracil, guanine, and cytosine.
Answer:
True
Explanation:
Trust
which is the method of estimating fish in a pond
Explanation:
There is a popular sampling method called capture – recapture or 'Lincoln Index' or 'Pieterson's Method' which is used to estimate the size of an animal or human population.