All of the following are true of spermatogenesis EXCEPT: Question 18 options: DNA replicates once, but cells divide twice. The products are spermatozoa that each have a head, midpiece and tail. Spermatids containing 23 chromosomes (1n) are produced. One spermatogonium produces 4 spermatids Genetically diverse spermatids are created.

Answers

Answer 1

Answer:

One spermatogonium produces 4 spermatids FALSE. One primary spermatocyte produces 4 spermatids.

Explanation:

Germ cells are diploid reproductive cells in charge of gamete production. Germ cells divide by mitosis and meiosis. Through mitosis, they originate more sexual cells, but through meiosis, they produce gametes -sperm and egg cells-. This process is known as gametogenesis.

Gametes´destiny is to merge during fecundation, and a new diploid cell called zygote emerges through fertilization. The zygote is a complete cell and suffers successive mitosis to form the new organism.

Spermatogenesis is the process of production and maturation of sperm cells. Spermatogonia are the masculine diploid germ cells, carrying 46 chromosomes. These germ cells suffer mitosis to reproduce. Some of them stay as spermatogonia, and some others become primary spermatocytes, which are in charge of gamete production. Primary spermatocytes are also diploid cells, meaning that they still carry 46 chromosomes.

Each primary spermatocyte replicates its genetic material and then goes through meiosis I to produce two daughter haploid cells called secondary spermatocytes, each of them carrying 23 chromosomes. Each secondary spermatocyte will produce two other haploid daughter cells by meiosis II.

The total result from the two cellular divisions of each primary spermatocyte is four haploid daughter cells called spermatids.

During spermiogenesis, spermatids mature into spermatozoa or sperm cells. Each sperm cell characterizes by being composed of a head, midpiece, and tail.

DNA replicates once, but cells divide twice TRUE The products are spermatozoa that each have a head, midpiece, and tail TRUE  Spermatids containing 23 chromosomes (1n) are produced TRUE One spermatogonium produces 4 spermatids FALSE. One primary spermatocyte produces 4 spermatids.Genetically diverse spermatids are created TRUE

Related Questions

If you're running away from a bear, A) both your liver cells and my leg muscle cells will be running glycolysis. B) both your liver cells and my leg muscle cells will be running gluconeogenesis. C) your liver cells will be running gluconeogenesis and your leg muscle cells will be running glycolysis. D) your liver cells will be running glycolysis and your leg muscle cells will be running gluconeogenesis.

Answers

Answer:

C) your liver cells will be running gluconeogenesis and your leg muscle cells will be running glycolysis.

in some plants pink flowers are dominant over yellow flowers if Mario crosses two hybrids what happens

Answers

75% pink 25% yellow

Why did the White House experience water damage ?

1.
It is made of granite which is strong.

2. It is made of sandstone which is very porous and is easily penetrated by rainwater

3. It is made of non-porous sedimentary rock

Answers

The White House building is made of sandstone which is very porous as a result water is easily penetrated inside it which causes damage and make the walls of building weak.

The White House is made of gray-colored sandstone that is brought from quarry in Aquia, Virginia. The north and south porticos of white house building are constructed with red Seneca sandstone brought from Maryland. These sandstones are porous in which rainwater is easily penetrated in it that cause damage to the white house building so it is concluded that the building is made of porous sandstone.

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When neuroscientists employ the term "nucleus", they are usually referring to:_____.
​a. a cluster of glial cells in the dorsal-medial CNS.
​b. a neural unit composed of anatomically and functionally related neurons.
​c. a group of homologous ganglia located either in the cortex or in the cerebellum.
​d. cognitively synchronized clusters of apical dendrites anywhere in the PNS.

Answers

Answer:

B. A neural unit composed of anatomically and functionally related neurons.

Which one of the following physical quantities is formed after dividing mass of volume?
I} Weight
II} Velocity
III} Density
IV}Work​

Answers

Answer:

Density

Explanation:

Density is refer to how much space an object in Mass take in volume.

It is mass if an object divided by volume.

It usually in g/cm3

Given the gene sequence GGACCGTCGATCTTC, which of the following choices would represent an inversion mutation?
A. CCACCGTCGATCTTC
B. GGACTCGATCTTC
C. GGACCGTCGATCTTC
D. GGACCGTCGATCCTT
Reset Selection



ASAP

Answers

Answer:

D. GGACCGTCGATCCTT

Explanation:

Mutation refers to any change in the nucleotide sequence of a gene. Mutation can be of different types depending on how it occurs. According to the question, an INVERSION mutation is a type of mutation in which a segment of a gene gets broken off and reattached in another way on the same DNA. Hence, the only change in inversion mutation is the arrangement of the nucleotide bases on the gene.

Considering the nucleotide sequence: GGACCGTCGATCTTC, the sequence that describes an occurrence of inversion mutation is: GGACCGTCGATCCTT because the segment TTC in the original sequence has been rearranged as CTT in the mutated sequence.

1) What is the function of the plasma membrane? (5pts)

2) How does high and low temperature affect a plasma membrane's fluidity? (5pts)

3) How does passive transport differ from active transport? (5pts)

4) What are the three main types of passive transport? Describe each of them. (5pts)

5) List the three types of tonic solutions and describe which way water moves in each one. (5pts)

Answers

Answer:

1.Plasma membrane is a semi permiable layer present in a plant cell.it allows only selected substances to pass in and out of the cell.

water is an important chemical that dissolves other chemicals into what

Answers

Answer:

A Solution

Explanation:

A substance that is dissolved is a solution

I need help please???

Answers

Answer:

The first one is called longitudinal wave .

the longish point is , i think 1

Is the scorpion vertebrate ? ​

Answers

Answer:

scorpions are invertebrates but are insects

Answer:

A animal that is an vertebrate has a spine, and backbone. Some of these animals can be humans, dogs, cats, etc. But most 6 legged creatures, 8 legged creatures do not have a backbone.

To answer your question, no, scorpions are not vertebrates because they do not a spine and backbone.

Importance of antimicrobial emulsion​

Answers

Answer:

Citral is a typical essential oil used in the food, cosmetic, and drug industries and has shown antimicrobial activity against microorganisms. Citral is unstable and hydrophobic under normal storage conditions, so it can easily lose its bactericide activity. Nanoemulsion technology is an excellent way to hydrophilize, microencapsulate, and protect this compound. In our studies, we used a mixed surfactant to form citral-in-water nanoemulsions, and attempted to optimize the formula for preparing nanoemulsions. Citral-in-water nanoemulsions formed at So 0.4 to 0.6 and ultrasonic power of 18 W for 120 seconds resulted in a droplet size of < 100 nm for nanoemulsions. The observed antimicrobial activities were significantly affected by the formulation of the nanoemulsions. The observed relationship between the formulation and activity can lead to the rational design of nanoemulsion-based delivery systems for essential oils, based on the desired function of antimicrobials in the food, cosmetics, and agrochemical industries.

what evidence shows that biological molecules on earth form naturally?

Answers

Explanation:

La siguiente entrada tiene como objetivo realizar una breve explicación sobre las moléculas biológicas  lipídos y carbohidratos, las cuales son muy diversas ya que están formadas por carbono, lo cual hace que puedan formar muchos tipos de enlaces. Esta capacidad permite que las moléculas orgánicas  adopten muchas formas complejas, como son las cadenas, las ramificaciones y los anillos.

Las moléculas biológicas son grandes polímeros que sintetizas para poder enlazarse con otras subunidades mucho mas pequeñas conocidos como monómeros. Las cadenas de subunidades estan unidas por enlaces covalentes los cuales se forman por deshidratación, estas cadenas pueden romperse por hidrólisis. La moléculas biologicas más importantes son los carbohidratos, lípidos, proteínas y ácidos nucleicos.

Jacqueline is a 42-year-old woman who is in her third trimester of pregnancy. Jacqueline has had three other children; their birth weights were 9.0 lbs, 9.5 lbs and 9.3 lbs. Jacqueline is a smoker with high blood pressure, and has gained 75 pounds during the last 4 months. 1. What is your diagnosis? 2. What test can you use to confirm your diagnosis? 3. What is Jacqueline's prognosis? 4. What treatments are available?

Answers

 The health condition identified is diabetes in pregnancy. To confirm my diagnosis, blood glucose test is performed.Jacqueline's prognosis, that is cause of the medical conditions, is gotten from her history of over weight babies and smoking. The available treatment is insulin injections.

Diabetes mellitus is a metabolic condition that occurs when the pancreas fails to produce enough insulin or when the body fails to use the insulin produced for glucose metabolism thereby leading to hyperglycaemia (increased blood glucose levels).

In pregnancy, diabetes is suspected in women who give this type of history:

Previous Delivery of babies weighing 9.0lbs and above.Cigarette smoking. And abrupt weight gain toward term of pregnancy.

Constant monitoring of Jacqueline is required to prevent complications during and after the pregnancy. This is done by performing series of tests and giving insulin injections when the need arises.

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Soil moisture (wethess) is
important for...?
A. it is a determination of how much water the soil can
hold and how easily water moves through,
B. it is evidence of how easily the process of runoff in
which the soil is filtered can occur.
C. Both & B
D. None of the above

Answers

Explanation:

Soil moisture is a key variable in controlling the exchange of water and heat energy between the land surface and the atmosphere through evaporation and plant transpiration.

Which of the following is an example of evolution?
A. Plants colonizing inland areas after developing vascular systems that can hold and transport water.
B. An organism developing immunity to a disease after surviving it.
C. A Chameleon changing color when entering a different environment.
D. An organism dying because it is not adapted to its habitat.

Answers

Answer: B

Explanation: because it adapt to its environment to survive

The development of an organ system like a vascular system over a long period of time in plants is an example of evolution. Thus option A is correct.

What is evolution?

Evolution is a series of events that have taken place in several years to make the species more advanced for the environment due to the introduction of multiple mutations in the genetic sequence.

During evolution, plants have gained the genetic mutation that codes for the vascular system which provide support and transports water in plants. So option A is correct.

Learn more about evolution, here:

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If a diglyceride is formed, how many water molecules are involved?

a.
One.

b.
It depends upon the length of the fatty acids involved.

c.
Two.

d.
Three.

e.
None.

Answers

Answer:

b.

It depends upon the length of the fatty acids involved

Breast milk is naturally formulated to meet the nutritional needs of a growing infant.

a. True
b. False

Answers

The answer for this question is true

How are growth and development dinstinct from each other

Answers

Answer:

Growth is a physical change in ones body size that can be easily observed.

Development is the ability to do things complex, challenging, and difficult.

Step One: Anatomical Developments
Match the following anatomical developments (A-J) with the number where they occur on the Hominin Anatomy Phylogeny (below).
A. decreased prognathism, moderate sized molars, phalanges not curved (derived), Found in South Africa, still relatively small brain (-450cc)
B. canine reduction, lower jaw tooth row shape intermediate between parallel and parabolic, have footprints explicitly displaying bipedal
patterns, curved phalanges
C. further brain expansion, decrease in teeth size, decrease in brow ridges, flattening of the face, mental eminence, vertical forehead
D. megadontia complex (huge molars, jaws, and chewing muscles), slight increase in cranial capacity (410-530cc)
E. femur and pelvis indicate capable of bipedalism
F. brain expansion, megadontia reduction, smaller less projecting face, smaller jaws
G. occipital bun common, retromolar space, robust postcrania, relatively short limbs
H. further brain expansion, reduction in teeth, face, and jaws, increased brow ridges, increased body size
1. loss of honing complex, obligate bipedalism, curved phalanges (primitive), parallel tooth row shape
J. foramen magnum position indicates likely capable of bipedalism

Answers

A. Hoomo ergaster & Hoomoo erectus

B. Hoomoo erectus

C. Hoomoo ergaster

D. Hoomoo Habilis

E. Hoomoo ergaster and Hooomo erectus

F. Hoomo Habilis

G. Hoomoo erectus

H. Hoomoo ergaster

I. Hoomoo ergaster and Hoomoo erectus

J. Hoomoo erectus

Homooo erectus fossils are found in China and Indonesia. They have widest part of brain case at cranial base.

They have reduced post canine and decrease jaw size. They have shorter forelimbs and are bipeds.

Homooo habiliss are dimorphic species which have long forelimbs and shorter forelimbs.

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In this excerpt, a reader can conclude that Lizzie is playful based primarily on her

Answers

Answer:

based on Lizzie's words

Many resources pose risks to human health, for example poisonous chemicals, fuels and explosives. Use of these resources is often considered to be sustainable because people must follow safety rules when they use them.

Do you think the use of asbestos could be made sustainable in the same way?

Answers

Answer:

The answer is:

Explanation:

Yes, since asbestos also could be poisonous and I think it could be sustainable in the same way

Hope this helps....

Have a nice day!!!!

Need answer ASAP! A car runs out of gas and slowly coasts to a stop. This is an example of the following?
O A. short time, small force
B. long time, small force
O c. short time, large force
D. long time, large force

Answers

They were is definitely long time

Answer: long time, small force

which of the following is not a component of downstream process?
a) Seperation
b) Purification
c) Preservation
d) Expression​

Answers

Answer:

d) Expression

Explanation:

Downstream processing is the recovery of biological products which includes stages extraction, separation, purification and preservation of the biotechnological products. The product is formulated with suitable preservatives. Therefore, the correct answer is option d.

Answer from Gauth math

preservation

Explanation:

may this help you

how to solve this ÷±≈∨∉㏒㏑∡

Answers

Answer:

what's that

I'm clueless

fatty acids are the building blocks of.

A. lipids
B. amino acids
C. DNA
D. monosaccharides

Answers

It’s most likely lipids! Hope this helps

Fatty acids are building blocks of lipids. The correct option is A.

Fats and oil are known as lipids.

Lipids are part of the classes of food which are made up of high proportion of carbon and hydrogen with very little oxygen.

Fats are solids and oils are liquids at room temperature. They serve the following functions to the body:

They provide the body with energyThey are solvents for fat-soluble vitamins and hormones.

Before lipids can be absorbed into the body, they must be broken down into fatty acids and glycerol.

Therefore, fatty acids are building blocks of lipids.

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A new member of your team is visually impaired. He's having a hard time reading his computer screen. How can you show that you value diversity? a) Suggest the organization may not be a great fit. O b) Tell him to apply for a different job within the organization that does not b) require computer usage. 12 Od Tell him that he might want to schedule an eye exam. c) d) Provide access to technology that can magnify or read what is on the computer screen.

Answers

Explanation:

Provide access to technology that can magnify or read what is on the computer screen.

Glycolysis occurs in
1) mitochondria
2) cytoplasm
3) ER
5) Plastids​

Answers

Cytoplasm

Cytoplasm is a jelly-like substance between the nucleus and the cell membrane.

Various cell organelles like ribosomes, mitochondria, endoplasmic reticulum, etc. are suspended in the cytoplasm.

It helps in exchange and storage of substances among cell organelles.

Most of the metabolic reactions also occur inside cytoplasm.

black coffee has a pH of 5, therefore its H+ concentration is ______ times greater than a solution with a pH of 10.

Answers

Answer:

100,000

Explanation:

pH of coffee = 5

pH of solution = 10

Concentration of H+ ions between successive pH values are in multiples of 10

Hence, the pH difference :

pH of solution - pH of coffee

(10 - 5) = 5

Hence, difference in H+ ions will be :

10^5 = 10*10*10*10*10 = 100,000 times

What can you learn about by studying DNA?

Answers

Answer:

whether these DNA tests can tell us much about an individual newborn's destiny, they are already a useful research tool that is providing new insights into how genes and environments interact, new avenues for understanding how mental illnesses (and other illnesses) develop and new pathways to explore potential ...

hope this will help you

mark me brainliest

Answer:

Explanation:

we can learn about DNA tests can tell us much about an individual newborn's destiny, they are already a useful research tool that is providing new insights into how genes and environments interact.

Normal blood clotting requires an adequate intake of vitamin K. Vitamin K is needed by the liver for
synthesis of prothrombin and other factors.
O a.
False
b. True
Clear my choice

Answers

It’s trueeeeeeeeeeeeeeeee
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