Answer:
A sperm is a gamete male or a sex cell. It joins with the female gamete, called an ovule, to create a zygote. The process of formation is called fertilization.There are two parts to the sperm cell, the head and the tail. The arrangement of the sperm makes it ideally built for the efficiency of its purpose. The tail of the sperm helps give it the momentum it needs to reach the egg cell, so that the embryo can be created first. The sperm develops a tail and sheds the excess cytoplasm of the shaft. When the sperm is full, the tail will spin like a propeller such that the sperm will move itself forward. Mitochondria in the linking component generates the energy ( ATP) required to travel.The sperm cell is made up of the head, body (mid-section) and tail. Each of these parts is equipped with different molecules and a smaller structure that enables the sperm to function properly as a whole. Mature sperm cell (sperm cells) is 0.05 milliliters wide. It's made up of the head, body and tail. The head is covered by the ac-cap and contains a dense genetic material nucleus of the 23 chromosomes.
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Answer:
A sperm cell is the male reproductive sex cell. Sperm cells of different animal species have different shapes and structures. In humans it consists of two major parts, the head and the tail. The head is flat and almond-shaped. The head contains the nucleus which carries genetic substances called chromosomes. One sperm cell contains half the number of chromosomes the species has. Humans have 46 chromosomes so each sperm cell has 23. The sperm cells also carry the X or Y chromosome that determines the sex of the future child.
The tail of the sperm, sometimes called the flagellum, is a slender, hairlike bundle of filaments that connects to the head. It whips and undulates so that the cell can travel to the egg. Following sperm deposition in the female reproductive tract, activation of tail movement is suppressed until the sperm is carried to within a relatively short distance of the egg. This gives the sperm an increased chance of reaching the egg before exhausting its energy supplies.
Rock disintegrating into smaller and smaller particles over time is an example of _____.
A. erosion
B. deposition
C. chemical weathering
D. mechanical weathering
Plants get for photosynthesis from the sun.
Answer:
Plants gain food from the sun by Photosynthesis,
Explanation:
The process by which green plants and some other organisms use sunlight to synthesize foods from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a byproduct
Answer:
Light energy
Explanation:
Photosynthesis is a process that certain organisms called autotrophs, undergo to make their own food. Autotrophs are also called producers. Some examples of autotrophs/producers are plants and algae.
The photosynthesis equation is
carbon dioxide+water+light energy —> glucose+ oxygen
Carbon dioxide, water and light energy from the sun are turned into glucose (the food for the organism) and oxygen (waste product).
The sun provides the plant with light energy for photosynthesis. Therefore, the answer is light energy.
Which statement best describes a physical change?
O Changes can occur to certain chemical properties of the substance, but the overall shape of the substance will remain the
same
O Changes can occur to certain physical properties of the substance, but the overall shape of the substance will remain the
same
O Changes can occur to physical properties of a substance, but the chemical composition of the substance remains the
same
O Changes can occur to chemical properties of a substance, but the chemical composition of the substance remains the
same
Answer:
Changes can occur to physical properties of a substance, but the chemical compostionof the substance will remain the same
The first Clean Water Act of 1972 was significant because it
Answer:It kept the waters clean from polution
Explanation:
How could you change your model to indicate a moon that is at apogee and perigee?
Answer:
The moon would look bigger during the perigee and it would look small during the apogee.
Explanation:
5. After a signal is transmitted from the eyes through the optic nerve, which part of the
the visual information?
O A. The frontal lobe
O B. The occipital lobe
OC. The limbic lobe
OD. The temporal lobe
Answer:
The answer is B. The occipital lobe.
Explanation:
The brain receives signal or information for vision through one of the five senses, the eyes. The brain processes the visual information in the occipital lobes of the cerebrum. The occipital lobes are one of the four main lobes of the cerebral cortex. The eyes transmit this information to the visual cortex. The visual cortex takes processes the information so, we are able to see the things.
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8. Scientists divide the atmosphere into how many layers?
O eight
O five
Oseven
O four
five
Explanation:
fiveeeeeeeeeeeeeeeee
Answer:
five parts have been divided for atmosphere
In performing its enzymatic function, carbonic anhydrase
Answer:
In performing its enzymatic function, carbonic anhydrase: requires the inorganic coenzyme zinc.
Explanation:
Got that from Quizlet
Place the following concepts in the correct order to explain how you can get shocked
after walking across the floor and reaching out to touch a doorknob or other object.
large electrical potential difference, induction, conduction, charging by
friction, static discharge
b)
none of the above
charging by friction, induction, large electrical potential di..vrencu, static
discharge
O d) induction, large electrical potential difference, conduction, repulsion
e) charging by friction, induction, conduction, static discharge
Answer:
The correct answer is option c.
Explanation:
When someone walking across the floor the friction is the concept that works in between the feet and floor or rug or carpet which makes the exchange between floor to the person. Now the body of an individual has a static charge at the moment.
When the person touches the doorknob or any metal, electrons move from the body of that individual to the handle or knob through the fingertips as static discharge due to the electrical potential difference and the person gets an electric shock.
Thus, the correct answer is option C.
A project for a science class asks teams of students to build a windmill. The windmill is placed in front of a large floor fan. The goal for the project is to lift the greatest mass to a height of 1 meter in one minute. Which team had the best design?
A) Team A
B) Team B
C) Team C
D) It cannot be determined from the information in the table.
WILL MARK BRAINLIEST
Thank you
Answer:
C
Explanation:
I only say C because it seems closest.
Answer:
c
Explanation:
Team c
Parents that are heterozygous for having freckles (dominant) are crossed.
What represents the ratio of their offspring? Draw a Punnett square and show your work.
Answer:
Phenotypic ratio - 3 Freckes : 1 No freckles
Explanation:
This question represents a monohybrid cross i.e. involving a single gene coding for possession or not of freckles. The allele for possession of freckles (F) is dominant over the allele for no freckles (f).
In a cross between two HETEROZYGOUS parents i.e. Ff × Ff, each parent will produce gametes with alleles F and f respectively. Using a punnet square (see attached image), four possible offsprings will be produced with genotypes: FF, Ff, Ff and ff.
Based on this genotypes, the phenotypic ratio of the offsprings will be 3:1 where 3 offsprings will possess freckles and 1 will have no freckles.
How does osmosis affect plants?
Osmotic pressure helps plants to keep its rigid structure.
Osmosis allows more sunlight to enter the plant.
Osmosis prevents plants from loosing water.
Osmosis helps distribute nutrients in different parts of the plant.
Answer:
the best answer is D. Osmosis helps distribute nutrients in different parts of the plant.
Which best explains how gravity contributes to the formation of layers in protoplanets? Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials. Gravity causes materials to undergo radioactive decay, which produces heat and leads to the melting, sinking, and rising of materials. Gravity absorbs heat, which cools materials and causes them to sink and rise. Gravity releases heat into space, which cools materials and causes them to sink and rise.
Answer:
A
Explanation:
The sentence that best explains how gravity contributes to the formation of layers in protoplanets is ; ( A ) Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials
Gravity is the force that attracts bodies with masses towards each other. bodies with larger masses posses greater forces of gravity. therefore
from the options gravity attracts materials and causes compaction which produces heat and leads to the melting, sinking and rising of materials.
Hence we can conclude that Gravity attracts materials and causes compaction, which produces heat and leads to the melting, sinking, and rising of materials
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Cigarettes reduce the supply of _________ to the fetus, so their _________ has to beat harder. Cigarettes contain over _________ chemicals, including harmful gases like _________ _________. Smoking will make the baby more likely to be born _________.
Answer:
Explanation:
cigarettes reduce the supply of oxygen to the fetus,so their heart has to beat harder.Cigarettes contain over 7000 chemicals,including harmful gases like carbon monoxide.Smoking will make the baby more likely to be born dead
Answer:
Cigarettes reduce the supply of oxygen to the fetus, so, their heart has to beat harder. Cigarettes contain over 7,000 chemicals, including harmful gases like Hydrogen cyanide. Smoking will make the baby more likely to be born with low birth weight or birth defects.
Explanation:
or it maybe dead
What causes cells to have different functions despite having the same DNA?
Answer:
This is on the grounds that the entirety of the cells in our bodies start from a solitary prepared egg. With hardly any exemptions, all cells in an individual's body have a similar DNA and qualities. As cells isolate and develop various qualities are communicated, bringing about various cell types.
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Given the choice of 4 bases and the number of bases needed to make up a codon, how many possible codons are there? 16 23 64 128
Answer:
64
Explanation:
A codon is a group of three nucleotide sequence in a mRNA that specifies a particular amino acid acid. There are only four nucleotides composed of the four nitrogenous bases viz: Adenine, Guanine, Cytosine and Thymine/Uracil.
A codon is composed of only three of these nucleotide bases at a time. Hence, considering the number of nucleotide bases that can make up one codon and the 4 nucleotide bases, there can only be 4^3 = 64 combinations of the four nucleotides. This means that there are 64 possible codons.
Which of the following statements supports the claim that plants use a negative feedback system to conserve water during hot, dry weather?
A. The rate of photosynthesis falls off as the size of stomatal pores decreases.
B. The size of stomatal pore openings decreases as a function of humidity and soil hydration.
C. Stomata open and close in response to light signals and are sensitive to blue light in particular.
D. Stomata are located on the underside of leaves in plants that inhabit arid environments.
Which of the following individuals made the healthiest choice?
A.
Nancy ordered chicken nuggets.
B.
Tim ordered a cheeseburger.
C.
Kate ordered a salad with grilled chicken.
D.
Robert ordered chili cheese fries and a chocolate shake.
Put birds,fly,spider,horse,cow,goat,& human in correct food chain order?
Answer: fly, spider, bird, goat, horse, cow, human
Explanation:
was quantitative data collected ? Explain.
Answer:
As quantitative data collection methods are often based on mathematical calculations, the data obtained that way is usually seen as more objective and reliable than qualitative. Some of the most common quantitative data collection techniques include surveys and questionnaires (with closed-ended questions).
Explanation:
Which of the following are not removed from the oil during the refining process?
Hydrocarbons are not removed from crude oil.
What is refining of oil?
The term refining of oil has to do with the process of obtaining from crude oil, fractions that are useful for various purposes.
There are many fractions that can be obtained form crude oil. These fractions are often composed of hydrocarbons. Thus during the refining process, hydrocarbons are not removed from crude oil.
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Which of the following factors might be affected by a wildfire? a. food b. shelter c. biodiversity d. all of the above Please select the best answer from the choices provided A B C D
Answer:
D
Explanation:
If a wildfire swept through an environment, all these things would be affected. Food would be burned, shelter would be gone, biodiversity would be unbalanced.
Answer:d
Explanation:
How do miners form rocks?
Answer:
Surface mining allows extraction of ores that are close to Earth's surface. Overlying rock is blasted and the rock that contains the valuable minerals is placed in a truck and taken to a refinery. ... Other methods of surface mining include strip mining, placer mining, and dredging.
Explanation:
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The somatic nervous system is responsible for controlling ______; the autonomic nervous system is responsible for controlling ______.
A. skeletal muscle and smooth muscle; cardiac muscle and organs
B. cardiac muscle and smooth muscle; skeletal muscle and organs
C. skeletal muscle; cardiac muscle, smooth muscle, and organs
D. organs and cardiac muscle; skeletal muscle and smooth muscle
C. skeletal muscle; cardiac muscle, smooth muscle, and organs
Explanation:The somatic nervous system has voluntary control of body movements via skeletal muscles, whereas the autonomic nervous system is responsible for controlling involuntary body functions, such as heartbeat, blood flow, breathing, and digestion.Skeletal muscle system (SNS) regulating voluntary skeletal muscle contraction and autonomous nervous system ( ANS) regulating involuntary control of smooth, cardiac muscles and glands.Hope this helps.
Mitosis should be error free; however, if errors do occur healthy cells can become___
cells.
Answer:
Explanation:
When a cell divides, it creates two identical daughter cells that each carry a copy of the original cell's DNA. The name for this process is mitosis, and errors in the process result in incorrect DNA copies. The effects of these errors on the health of the organism range from benign to deadly, depending on their number errors and type. One potential consequence is cancer;
During which period of development do individuals gradually become able to think like adults? adolescence childhood infancy adulthood
Answer:
Adolescence
Explanation:
Answer:
adolescents
Explanation:
when you reach the age where you are concerned of things like adults but are not get one
When NAD+ becomes NADH, it is being
NAD+ accepts a hydrogen ion (H+) and two electrons (2e−), as it becomes reduced to NADH + H+. The NADH moves to the electron transport chain and donates a pair of electrons (becomes oxidized) to the first compound in the chain.
Explanation:
When NAD+ becomes NADH, it is being reduced.
What is NAD+ and NADH?NAD+ is a coenzyme that is involved in many metabolic reactions. It is a dinucleotide, meaning that it is made up of two nucleotides. The nucleotides are nicotinamide adenine dinucleotide (NAD) and adenosine diphosphate (ADP).
NAD+ is oxidized when it loses an electron. This leaves the nicotinamide ring with an extra hydrogen atom, which gives NADH its name. NADH is a reduced form of NAD+.
The reduction of NAD+ is a necessary step in many metabolic reactions. For example, NADH is used in glycolysis, the process by which cells break down glucose to produce energy. NADH is also used in the Krebs cycle, the process by which cells break down carbohydrates, proteins, and fats to produce energy.
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Why is Louis Pasteur considered the national hero of France?
Answer:
For his proof of germ theory, discovery of fermentation, and invention of pasteurization, Louis Pasteur was a French national hero by age 55, and even today, his name is a household word across the world
Explanation:
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Which is true about cold fronts?
A. They tend to move quickly
B. They do not form clouds
C. They cause warm and humid weather
D. They tend to stay in one place
Answer:
A.
Explanation:
Because they move faster then warm fronts.
Answer:
its A mark meh pls
Explanation: