*Biology* Please help!
Answer:
3:1
Explanation:
i hope it will be helpful
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.
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 TRUEpart of the eye that gives people different eye colors
homeostasis is maintained through posterior pituitary endocrine hormones that act on the ______.
Answer:
may be glands
Explanation:
The glands of the endocrine system secrete hormones into the bloodstream to maintain homeostasis and regulate metabolism. The hypothalamus and the pituitary gland are the command and control centers, directing hormones to other glands and throughout the body.
If a small drop of tiny particles such as pollen grains are dropped into a drop of water on a microscope slide, they will appear to vibrate and spread out. The primary reason for this is a. Currents in the water are pushing them around. b. They have internal energy and that is causing them to move. c. They are being continually struck by randomly moving water molecules from all sides and those strikes fluctuate and are sometimes uneven. d. Internal forces between the particles cause them to repel and attract.
Answer:
Internal forces between the particles cause them to repel and attract.
Which of the three soil types will be best for vegetable farming?
1. loam
2. clay
3. silt loam
Answer:
Explanation:1
PLEASE HELP!!!!
Question: Which of the followings are true of human genomic libraries? (More than one answer may be correct)
A. They contain the equivalent of the entire human genome, cloned into a vector.
B. They are likely to contain sequences derived from introns.
C. The use of the enzyme reverse transcriptase is crucial in their construction.
D. They contain DNA copies of the mRNAs present in a particular cell or tissue.
Answer:
B) They are likely to contain sequences derived from introns.
Explanation:
A couple owned a fine pure-bread albino female poodle (an autosomal recessive phenotype) and wanted to mate her to produce a litter of white puppies. They took her to a breeder, who said he would mate the female with an albino stud male, also from a pure stock. When six puppies were born, they were all black, so the couple sued the breeder, claiming that he had replaced the stud male with a black dog, producing six unwanted puppies. You are called as an expert witness, and the defense asks you whether it is possible to produce black offspring from two pure-breeding recessive albino parents. What testimony do you give
Answer:
No, it is not possible to produce black offspring from two pure-breeding recessive albino parents. If he would have mated the female with a white male, the whole progeny should be white.
Explanation:
Due to technical problems, you will find the complete explanation in the attached files.
làm sao bảo quản để bánh không lên
Answer:
which language is this ?
Transfusion of type AB blood would introduce both A and B ______________ which would be ______________ monosaccharides type
Answer: hello your question is poorly written below is the question
answer:
Tetrasaccharides, Recognized, Triggers, Type B, Type A, Type O, Not recognize, TetrasaccharidesExplanation:
Both A and B Tetrasaccharides which would be Recognized as foreign and Triggers an immune reaction in recipients lacking either the A saccharide Type B or B Type A or both Type O . meanwhile the type AB blood would contain both A and B and would Not recognize those Tetrasaccharides as foreign
Read the information below then answer the questions which follow:
To grow, plants require water. They cannot get this water unless it is available in the soil. Plants
obtain water from the soil through their roots. It then passes up the stem and to the leaves and
flowers. The plant does not take all the water available in the soil. Much of the remaining water
evaporates into the surrounding air.
In an experiment, a stem which contained several flowers were placed in a beaker of water
containing red ink.
QUESTION 1
(1 mark)
What is the purpose of the experiment?
Answer:
I believe the experiment was too see if the flowers that would grow from the stem would turn out to be red in color. (Which is the reason they put red ink.)
(hope this helped :P)
which primitive organic molecule was essential to form lipid bilayer?
Answer:
autocatalytic RNA is the primitive organic molecules was essential form liquid bilayer .
Which of the following is a characteristic of the plasma membrane?
To protect the cell's internal contents, water is the only substance that can freely pass through the plasma membrane.
Only small molecules are allowed into and out of the cell by the plasma membrane.
Its selective permeability allows certain molecules, such as oxygen and carbon dioxide, to flow freely in and out of the cell while controlling the flow of other molecules.
The structure of the phospholipids forms a stiff protective outer shell around the cell's internal contents.
Answer:
The plasma membrane forms a barrier between the cytoplasm and the environment outside the cell. A main characteristic of the plasma membrane is selective permeability
The following is a characteristic of the plasma membrane: Its selective permeability allows certain molecules, such as oxygen and carbon dioxide, to flow freely in and out of the cell while controlling the flow of other molecules, which is the third option.
What is the importance of the plasma membrane in cells?The plasma membrane acts as a barrier in the cell, controlling the movement of molecules as well as some gases such as oxygen, carbon dioxide, and water that pass through it but not larger and more polar molecules. The importance of this is that it regulates and controls the inflow and outflow of substances such as hormones, etc.
Hence, the following is a characteristic of the plasma membrane: Its selective permeability allows certain molecules, such as oxygen and carbon dioxide, to flow freely in and out of the cell while controlling the flow of other molecules, which is the third option.
Learn more about the importance of the plasma membrane here.
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The meal Valerie is planning to eat at dinner has total 800 Calories. If 55% calories come from carbohydrate, 20% from fat and 25% from proteins, calculate the amount of carbohydrates, fats, and proteins (in grams) in the meal.
Answer:
Carbohydrate = 57.023g
Fats = 20.736g
Proteins = 25.919g
Explanation:
According to this question, Valerie is planning to eat at dinner meal that has a total of 800 Calories.
- 55% calories come from carbohydrate i.e. 55/100 × 800 = 440 calories
- 20% calories come from fat i.e. 20/100 × 800 = 160 calories
- 25% calories come from proteins i.e. 25/100 × 800 = 200 calories
Since 7.716 calories = 1g
1. Amount of carbohydrates in gram = 440/7.716 = 57.023g
2. Amount of fats in gram = 160/7.716 = 20.736g
3. Amount of proteins in gram = 200/7.716 = 25.919g
What distance was covered by the bicycle during the 10 seconds?
Over a long period of time the process of deposition causes the formation of
Answer:
sedimentary rock
Explanation:
the process of deposition refers to rock and soil depositing itself onto a landform and hardening into rock, specifically sedimentary rock.
age 12 of 14
A couple has three children. The table shows some of the characteristics of the
children.
Child
Sickle Cell/Normal
Sex
Blood group
1
Sickle cell
Male
B
Normal
2
Female
AB
3
Normal
Male
0
What type(s) of variation do these characteristics show?
A Continuous variation only
B Discontinuous variation only
C с Both continuous and discontinuous variation
D
Neither continuous nor discontinuous variation
Answer:
The answer would be B. Discontinuous Variation Only.
Explanation:
Gender is discontinuous as there's only male and female. Sickle Cell/Normal is also discontinuous as you can only be one or the other. Same with blood group as there's only four types and no in-betweens.
How are growth and development dinstinct from each other
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.
DNA is referred to as a______, meaning that it has
strands that are______together.
Answer:
molecule
wound
Explanation:
DNA is the chemical name for molecule. The strands wind together and form a double helix.
Which of the following is NOT a function of behavior?
A. To produce ATP.
B. To find food.
C. To reproduce.
D. To avoid predators.
Answer:
A to produce ATP as you are subconsciously producing ATP and you can not control it
Explanation:
To find food, to reproduce, and to avoid predators all are the functions of behavior except the production of ATP. Thus, the correct option is A.
What are the functions of behavior?Behavior is the range of actions and manners which are made by individuals, systems or artificial entities in a given environment. This can include other systems or organisms as well as inanimate physical environment.
The four main functions of behavior of an organism are attention, escape, access, and sensory needs. These four functions allow us to understand and categorize someone's actions, as well as determine the behavior of organisms such as finding food, reproduction, and avoiding the predators.
Therefore, the correct option is A.
Learn more about Behavior here:
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Protein channels allow
molecules in and out of
the cell without using
energy. Therefore, they
are an example of which
type of transport?
Answer:
I think that it is an example of a passive transport
Explanation:
The mutation of a cell for a specific function is called
Explanation:
A gene variant if functionof mutation
Answer:
A gene variant for a specific function
hey everyone, What is earthquake mention the effects of earthquake.
Answer:
earthquake is what happens when two blocks of the earth suddenly slip past one another.
Explanation:
effects of earthquakes are ground shaking, ground rupture, landslides, tsunamis, and liquefaction
If the time interval is 55 seconds, what is the distance to the epicenter?
Assuming that a person going to community college can't afford to go to a four-year college is an example of ) a generalization. b) discrimination. O c) a stereotype. O d) tolerance.
The mass of the Sun is 1.99 × 1030 kg. Jupiter is 7.79 × 108 km away from the Sun and has a mass of 1.90 × 1027 kg. The gravitational force between the Sun and Jupiter to three significant figures is × 1023 N.
Answer:
4.16
Explanation:
edge2021
Answer:
4.16
Explanation:
what is gestation period?
Answer:
gestation period is the period of development during the carrying of the embryo or fetus inside viviparous animals
what is osmolarity of mammalian urine?
Answer:
The osmolarity of mammalian urine may vary over time. The osmolarity of mammalian urine varies little between species. Mammalian urine is always hyperosmotic to blood. The osmolarity of mammalian urine may vary over time.
Explanation:
I hope it will help you
where is plants respiration takes place?
Answer:
MitochondriaExplanation:
Plants create their own nourishment to live in the natural world. Plants absorb oxygen from the air through their stomata, much like they do during photosynthesis. In the presence of oxygen, respiration takes place in the mitochondria of the cell, which is referred to as "aerobic respiration."
OAmalOHopeO
What's is biosynthesis
Answer:
the part of an organism close to the flesh and the cells
Explanation:
Biosynthesis is a multi-step, enzyme-catalyzed process where substrates are converted into more complex products in living organisms. In biosynthesis, simple compounds are modified, converted into other compounds, or joined together to form micro molecules. This process often consists of metabolic pathways.
