The correct answer is that spermatids are larger and have a round shape, while spermatozoa are smaller and have a flagellum.
To understand the differences between spermatids and spermatozoa, one must consider their stages in spermatogenesis, the process by which sperm are produced.
Spermatids are the haploid cells that result from the second meiotic division of secondary spermatocytes. They are characterized by the following morphological features:
1. Size: Spermatids are larger than spermatozoa. This is because they have not yet undergone the final stages of differentiation and maturation that will transform them into mature sperm cells.
2. Shape: Spermatids have a round shape. They do not possess the elongated form that is typical of mature spermatozoa.
3. Nucleus: The nucleus of a spermatid is larger and less condensed compared to that of a spermatozoon. The DNA within the nucleus of a spermatid is not yet fully packaged with protamines, which are proteins that replace histones during spermiogenesis, leading to a more compact nucleus in the spermatozoon.
4. Cytoplasm: Spermatids have a significant amount of cytoplasm, which contains organelles and other cellular components necessary for their development into spermatozoa.
Spermatozoa, on the other hand, are the mature, motile sperm cells. They exhibit the following morphological characteristics:
1. Size: Spermatozoa are smaller than spermatids due to the loss of excess cytoplasm and the condensation of their nucleus.
2. Shape: Spermatozoa have an elongated shape with a distinctive head, midpiece, and tail. The head contains the condensed nucleus, the midpiece has mitochondria arranged in a helical fashion to provide energy for movement, and the tail is a flagellum that propels the sperm.
3. Flagellum: One of the most notable features of spermatozoa is the presence of a flagellum, which is an elongated structure that enables them to swim. Spermatids do not have a flagellum.
4. Acrosome: Spermatozoa have a specialized structure called the acrosome at the tip of their head. The acrosome contains enzymes that help the sperm penetrate the egg during fertilization. Spermatids begin to develop an acrosome, but it is not fully formed until the spermatozoon stage.
In summary, the two major differences in the morphology of spermatids and spermatozoa are that spermatids are larger and have a round shape, while spermatozoa are smaller, have an elongated shape with a distinct head, midpiece, and tail, and possess a flagellum for motility. These differences are crucial for the function of spermatozoa in fertilization.
Plants have cell walls to give them more structural strength. in order to facilitate movement of molecules from one plant cell to another, there are channels called ___________________ that run through the cell walls
Final answer:
Plasmodesmata are microscopic channels that facilitate the transport and communication between plant cells by connecting their cytoplasm, enabling the movement of water, nutrients, and other molecules throughout the plant.
Explanation:
The channels that run through plant cell walls facilitating the movement of molecules from one plant cell to another are called plasmodesmata. These are microscopic passages that allow plant cells to transport and communicate by directly connecting their cytoplasm.
Plasmodesmata enable the transfer of water, nutrients, and signaling molecules, bypassing the barrier that plant cell walls present to cell-to-cell contact. Along with vascular tissues like xylem and phloem, plasmodesmata play a crucial role in distributing resources throughout the plant.
The nurse is required to administer vitamin k to a term newborn. how should the nurse administer this injection
The factor that is being manipulated in a controlled experiment is called the
The condition of having low oxygen levels in the blood, usually due to respiratory disorders or heart conditions, is known as:
An elderly woman is seen in the clinic reporting a lesion on her labia majora and states that she has experienced some bleeding and itching as well. she states that this has been going on for approximately three months. she tells the nurse that she has not been to a health care provider in over 10 years. what diagnosis would the nurse expect the primary care provider to make
what is a of prokaryotic cell
Question 32 ribosomes carry out dna-directed protein synthesis. carry out rna processing are not found in prokaryotes. of mitochondria and plastids are very similar in their structure and function to bacterial ribosomes.
Organisms that have the ability to regulate their internal environment in order to maintain a steady state called ____.
Metabolism
Homeostasis
Life
what are the parts of the finger close to the nail called
During the light- dependent reaction of photosynthesis light energy is coverted into form of energy?
if a cell is isotonic in an 80% sucrose solution, how will the movement of water across the cell membrane affect the size of a cell if it is moved from an 80% sucrose solution to a 40% sucrose solution
The answer is; The cell will increase in size
When the cell is moved is the 40% sucrose solution, the solution will be hypotonic to the cytoplasm of the cell. Therefore, through osmosis, water will move from the sucrose solution to the inside of the cell. In osmosis, water moves from a hypotonic solution to a hypertonic solution through a semi-permeable membrane. If the cell is an animal cell, it may lyse because it has no cell wall to give it structural support.
The sugar __________ is found only in milk and milk products.
Carbohydrate molecules have all of the following bonds except-
A.C-C
B.C-N
C.C-H
D.C-O
A normal appearing couple is found to be heterozygous recessive for albinism. Both have the genotype Aa. The gene responsible for albinism is recessive to the normal pigment-producing gene. What are the chances of their children being albino?
A: 3:4 children will be albino.
B: All children will be albino.
C: 1:4 children will be albino.
Which proses occurs in a human muscle when it is forced to make atp without oxygen
Males with one copy of an X-linked gene are said to be _________ for that gene.
Human blood is composed of all the following except
what is the range for the following set of measurements? 27c, 12c, 31c, 19c, 23c, 11c, 17c
A) 0c to 100c
B)11c to 31c
C)1c
D)27c to 17c
Answer: B) 11c to 31c
Explanation:
We know that the range of any data gives us a interval which contains all the data and provides an indication of statistical dispersion from minimum value to the maximum value.
The given set of measurements : - 27c, 12c, 31c, 19c, 23c, 11c, 17c
Here the highest measurement :- 31c
The least measurement :- 11c
Then , the range of the given set will be :-
11c to 31c
Hence, the range for the given set of measurements is 11c to 31c .
Animals with a nervous system show several more complex types of responses. These responses are called A:Instinct or B:Learned responses
Answer:
B
Explanation:
Population genetics is the study of the variation in genes among a group of individuals. True False
Katrina is 20 years of age. she usually consumes about 1800 kcal per day. according to amdr guidelines, what is her range of protein intake?
How do latitude and altitude affect which plants grow in an area?
High-altitude air density and atmospheric pressure lower carbon dioxide levels and transpiration, which slows plant growth and large leaves' thick boundary layer can't absorb heat making them vulnerable to frost damage.
Why altitude and latitude affect plant growth?Plants fit their environment. Altitude-adapted plants must endure cooler temperatures. Annuals benefit from the brief summer season at higher altitudes, growing, blooming, and setting seed in weeks. High-altitude deciduous trees can't live because the summers are too short to grow leaves and store enough energy for the winters.
High-altitude plants struggle to conserve water. Water loss is higher at higher altitudes due to decreased humidity and lower rainfall. High-altitude wind also contributes. . Deciduous tree leaves lose too much water to live at high altitudes.
Seasons are caused by Earth's rotation angle relative to the sun. Plants must adjust to these temperatures. Deciduous trees lose their leaves and herbaceous perennials fall down to the ground during winter, whereas conifers restrict their activity but continue to photosynthesize.
Learn more about plant adaptaion, here:
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According to the law of conservation of matter, in any food chain we know that A) the quantity of matter in producers and consumers is always equal. B) matter is created at the start of a food web and destroyed in the end. Eliminate C) matter is changed into various forms but the total quantity remains unchanged. D) the amount of matter increases as the food web progresses from the producers to the consumers.
The answer is C. Matter is changed into various forms but the total quantity remains unchanged
Place the characteristic into the appropriate category of cell wall type.
Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, while plant cell walls are mainly composed of cellulose.
Explanation:In the context of cell wall types, the characteristic you provided is not specified. However, based on the information provided, the cell wall types mentioned are Gram-positive bacteria and plant cell walls. Gram-positive bacteria have a thick layer of peptidoglycan in their cell walls, while plant cell walls are mainly composed of cellulose. It is important to note that the information provided does not directly give a characteristic to place in a specific cell wall type category.
what does a lysosome do?
A student observes a leaf epidermis under a microscope. it has many stomata but they all appear closed. this epidermis was most likely from:
Which characteristics do scientists use to group species?
BIOLOGY ONE QUESTION PLEASE!
Answer:
student has to make sure all the plants are soaked in the same amount or volume of sodium bicarbonate solution. Also make sure the solution has the same concentration. Only this can make it a fair test and reduce the inaccurate results.
other wise have a control
Explanation:
Which of the following foods is highest in polysaccharides?
a broccoli
b fish
c cheese
d.potatoes
Answer:
The correct answer is the option: d.potatoes
Explanation:
Hello! Let's solve this!
A polysaccharide is made up of chains of monosaccharides. A well-known monosaccharide is glucose.
Starch is a polysaccharide made up of chains of glucose molecules.
In this case, the potato is the food that has polysaccharides, since it is made up of starch.
We conclude that the correct answer is the option: d.potatoes
While receiving a blood transfusion, the client suddenly shouts, "i feel like someone is lowering a heavy weight on my chest. i feel like i'm going to die!" which actions are priority?