Seeds are the male gametes in plants. true or false

Answers

Answer 1

Answer:

Seeds are not gametes.

Explanation:

Microsporophyll is a male gamete.

Macrosporophyll is a female gamete.

Answer 2

Answer:

False

Explanation:

Pollen is the male gamete in plants


Related Questions

Is it recommended for most adults that carbohydrates make up 45-65% of their diet, proteins make up 10-35% of their diet, and fats make up 20-30% of their diet. Does Deb’s diet mee these recommendations? Support your statement with calculations

Answers

Answer:No her diet does not. She is currently eating 128.52 calories each for protein, 289.17 calories from fat, and 1413.44 calories from carbs. This means she is consuming 6.6% of her diet from protein, 14.9%, of her diet from fat, and 73.2% of her diet from carbs.

Explanation:



Match each step of the scientific method with its description.

construct a hypothesis
communicate the results
test the hypothesis
make observations
analyze the results and
make a conclusion
ask questions
Bread, when kept in the open for a
long time shows the presence of mold.
arrowRight
What causes mold growth on bread?
arrowRight
Changes in temperature may affect
the growth of mold on bread.
arrowRight
Keep the bread in different locations,
changing the temperature at each location.
arrowRight
Increased temperature leads to the
growth of mold.
arrowRight
Make a presentation of the data, and
explain it to the class.
arrowRight

Answers

Answer:

I have put the question like this ;

Tiles

1. construct a hypothesis

2. communicate the results

3. test the hypothesis

4. make observations

5. analyze the results and

make a conclusion

6. ask questions

Pairs

A. Bread, when kept in the open for a

long time, shows the presence of mold.

B. What causes mold growth on bread?

C. Changes in temperature may affect

the growth of mold on bread.

D. Keep the bread in different locations,

changing the temperature at each location.

E. Increased temperature leads to the

growth of mold.

F. Make a presentation of the data, and

explain it to the class.

Explanation:

ANSWERS :

1- C ( this is an assumption; a hypothesis is always based on an assumption.

2- F ( this states to share the results with other classmates).

3- D (this is a description of an experiment you could conduct; you test a hypothesis (usually) by conducting an experiment.

4- A (this is something you could observe during the experiment, therefore it is an observation).

5- E (this sentence is a conclusion).

6- B (This is an actual question)

A researcher investigates a recently discovered species of plant. The plant has vascular tissues and exhibits a sporophyte and a gametophyte
generation, but lacks seeds. How should the researcher classify the plant?​

Answers

Answer;

pteridophyte

Explanation;

Pteridophyte are vascular plants in the phylum plants that reproduce by releasing spores rather than seeds.

Other characteristics of pteridophyte includes;

They show alternation of generations, that is the sporophyte generation and gametophyte generation are observed.Sporophytes has true roots, stem and leavesSporangia are produced in groups on sporophylls

Describe the factors that impact the ability for a skeletal muscle fiber to reach tetany. How do these factors influence the difference in twitch force as the muscle moves from a single twitch to a state of tetanus?

Answers

Answer:

Tetanus is a very aggressive disease generated by clostridium tetani, this clostridium, which is a bactera, releases a toxin that generates tetanization of the muscle, where it contracts massively and simultaneously, remaining over time, similar to a contracture and very different from synchronized and sporadic contraction that requires locomotion or other physiological contractions.

The Tetanus toxin acts as a toxin for the muscle cells that make up the skeletal muscle fiber, which unfortunately leads to the progressive death of the patient who suffers from it.

In simple words, tetanus generates muscle spasms that are maintained over time, preventing the function of the organ, that is, of the muscles, immobilizing them and prohibiting them from other movements.

Patients who reach the target are affected by the diaphragm that contributes to respiration, therefore many of the tetanized patients die in a similar way to suffocation due to a constant spasm of the diaphragm.

Explanation:

The bacterium is found in sporulated form on the ground or on oxidized surfaces, that is why it is important to sterilize oxidized elements or to decontaminate them, and to apply the antithetical vaccine, which is what prevents them from suffering from said pathology.

In simple words, the great differences between a physiological contraction of muscle fibers and tetanized contractions is the time in which they occur, since tetanization lasts over time and physiological does not, and the power of contraction in tetanization is greater. , since the toxin of said bacterium potentiates the ionic channels thus generating an increase in the contractile capacity of the muscle fiber compared to the physiological or health situation.

In order for the toxin to have an effect, the bacteria must leave its sporulated state, release the toxin and the wound must be deep enough for the bacteria to enter the bloodstream, after which the toxin enters the myocytes that are muscle fiber cells intensifying muscle spasms by opening calcium channels in a longer period of time, calcium channels are those found in the REL of myocytes, which act as a reserve for this ion, triggering so that the Z lines of the sarcomeros definitively approach spasmodically by shortening the length of the sarcomero.

Which molecule would be the most affected by limited nitrogen?
myofibrillar proteins in muscle
glucose molecules in starch
fat molecules surrounding organs
cellulose molecules in plant cell walls

Answers

The molecule that would be affected by limited nitrogen is the myofibrillar proteins in muscle because the myofibrils of the muscle have a number of protein molecules.

Myofibrillar proteins in muscle would be the most affected by limited nitrogen.

What are proteins?

Proteins are essential biomolecules composed of linear sequences of building blocks called amino acids.

The amino acids are composed of nitrogen (N), carbon (C), hydrogen (H) and oxygen (O), and often also sulfur (S).

Nitrogen is, therefore, a fundamental component of all amino acids, which form proteins such as enzymes, peptide hormones, etc.

In conclusion, myofibrillar proteins in muscle would be the most affected by limited nitrogen.

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explain how urine is formed in our body

Answers

Answer:

Urine is a liquid by-product of metabolism in humans and in many other animals. After the filtration of blood by kidneys, urine is produced. It is them passed through the ureters to the bladder to store it. While urinating, the urine is passed from the bladder through the urethra to discharge it.

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Hummingbirds drink nectar from flowers. As they pass from flower to flower,
the hummingbirds carry pollen, aiding in pollination. What kind of relationship
exists between the hummingbirds and the flowering plants?
A. Commensalism
B. Predation
C. Mutualism
D. Parasitism

Answers

C. Mutualistic relationship

Flowers and hummingbirds have a mutualistic relationship where both benefit. Flowers produce food in the form of nectar (sugar and water) to attract hummingbirds which, in turn, move pollen for the plant (pollination).

Question 11 (1 point)
Which of the following is not the name of a taxon?
Order
O Family
O Class
O Association​

Answers

It’s definitely the answer class

Sheila weighs 60 kg and is riding a bike. Her momentum on the bike is 340 kg • m/s. The bike hits a rock, which stops it completely and throws Sheila forward onto the pavement. If there is no net force on the system, what is Sheila’s velocity immediately after she is thrown from the bike?

Answers

Answer:

5.7 m/s     

Explanation:

The computation of Sheila 's velocity right after she gets thrown out of the bike is shown below:

1) The Physical principle: conservation of momentum.

If there is no net external force operating on a system, so the system's total momentum is conserved

The momentum, p, is a vector magnitude that is determined as the product of the mass by the velocity:

P = mv.

2) Taking into account therefore that there is no net force on the device, Sheila and the momentum of the bike are the identical pre and post collision.

Based on this, the calculation is as follows

Momentum before the collision:

       [tex]P_1 = (mass\ of\ Sheila + mass\ of\ the\ bike) \times velocity[/tex]

       [tex]P_1 = (60kg + m) \times v_1[/tex]

= 340 kg m/s

Now Momentum after the collision:

      [tex]P_2 = mass\ of\ sheila \times velocity\ of\ Sheila + mass\ of\ the\ bike \times velocity\ of\ the\ bike[/tex]

[tex]P_2 = 60kg \times v_2 + m \times 0 = 60kg \times v_2[/tex]

[tex]P_1 = P_2[/tex]

[tex]= (60kg + m) \times v_1[/tex]

[tex]= 60kg \times v_2[/tex]

[tex]= 340 kg .\ m/s[/tex]

[tex]= 60kg \times v_2[/tex]

[tex]v_2 = \frac{340\ kg .\ m/s }{60\ kg}[/tex]

= 5.7 m/s     

The velocity of Sheila immediately after she is thrown from the bike is 5.67 m/s.

The given parameters;

mass of Sheila, m = 60 kgmomentum of Sheila, P = 340 kg.m/s

The velocity of Sheila immediately after she is thrown from the bike is calculated as follows;

P = mv

where;

v is the velocity Sheila

[tex]v = \frac{P}{m} \\\\v = \frac{340}{60} \\\\v = 5.67 \ m/s[/tex]

Thus, the velocity of Sheila immediately after she is thrown from the bike is 5.67 m/s.

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Which would have more humus a desert or a forest

Answers

Answer:

a forest

Explanation:

thinks don't really grow in the desert

why are there no small organisms in the bathyal zone?
I will give 50 extra points if you are correct!!

Answers

Answer:

There are no known organisms because of the lack of sunlight necessary for photosynthesis to produce these organisms

Explanation:

The bathyal zone is less densely populated. Sunlight does not reach this zone, meaning primary production, if any, is almost nonexistent

A colorimeter is an instrument used for chemical analysis by comparing a liquid’s color with standard colors. In an experiment, a scientist used two colorimeters and noted the readings. The first colorimeter showed consistent readings that were five points lower than the actual reading. The second colorimeter provided readings that were the same as the actual reading. Which two statements are implications of these readings?


1). The first colorimeter is reliable but not valid.


2). The second colorimeter is valid and reliable.


3). Both the colorimeters are reliable and valid.


4). The readings of the first colorimeter can be used without repeating the experiment.


5). The readings of the second colorimeter aren’t reliable and can’t be used for the experiment.

Answers

Answer:

The correct answers are option A and B

Explanation:

The first colorimeter is reliable because the the reading it is showing is same for all the times the experiment is done. Though the result obtained is wrong but it is reliable.

The second colorimeter is valid and reliable because it is showing the correct results again and again. This is valid result as it is giving the result same as that of actual readings.

In a sample of double-stranded DNA, 30% of the nitrogenous bases are adenine (A).
What percentage of the nitrogenous bases in the sample are thymine (T)?
Choose 1 answer:
A. 20%
B. 30%
C. 60%
D. 70%​

Answers

Answer:

30% thymine

Explanation:

If 30% of Adenine is present, it would be reasonable to assume that 30% of Thymine will be present, as the ratio between the two complementary nitrogenous bases will be roughly equal. Therefore, that leaves us with 40% between Cytosine and Guanine.

What function do most of the stem cells in adults serve?
A. Differentiating into any type of cell
B. Repairing damaged DNA
C. Replacing damaged tissue
D. Growing new organs

Answers

I think it is going to be B. Repairing damaged DNA.
I think it’s B. Repairing damaged DNA

what causes ocean tides to reach higher up on a shore at certain of day than at others?

Answers

Answer:

Most tides are semidiurnal, which means they take place twice a day. For example, when an area covered by the ocean faces the moon, the moon's gravitational force on the water causes a high high tide. As the Earth rotates, that area moves away from the moon's influence and the tide ebbs.

Explanation:

Answer:

D. The moons gravity and Earth’s rotation

Explanation:

Lysosomal storage diseases (LSDs) are a group of rare and inherited genetic disorders in which some part of the lysosome does not function properly, causing the accumulation of toxic substances in the cell and ultimately, cell death. What would be the most likely explanation as to why the lysosomes of someone with this disease are not functioning properly?
A. The enzymes of the lysosome are beginning to break down the DNA of the cell.
B. The enzymes of the lysosome are not breaking down enough toxic material.
C. The enzymes of the lysosome are breaking down too much toxic material.
D. The enzymes of the lysosome are beginning to break down the ribosomes of the cell.

Answers

Answer: The enzymes of the lysosome are not breaking down enough toxic material.

Explanation:

Lysosomal storage diseases (LSDs) are a group of rare and inherited genetic disorders in which some part of the lysosome does not function properly, and this is due to the enzymes of the lysosome not breaking down enough toxic material in Option B.

What is the significance of lysosomal storage diseases?

Lysosomes are cell organelles that accumulate the cell's toxins or those that enter the cell from the outside (some bacterial particles, for example) and are broken down by the acidic pH of the lysosomes and the enzymes to keep the cell functioning properly. In the case of this disease, it does not work and damages the cell.

Hence, lysosomal storage diseases (LSDs) are a group of rare and inherited genetic disorders in which some part of the lysosome does not function properly, and this is due to the enzymes of the lysosome not breaking down enough toxic material in Option B.

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What is the atom structure?

Answers

Answer:

The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged). Atoms have different properties based on the arrangement and number of their basic particles.

PLEASE REFER TO MY IMAGE LABELED BELOW TO HELP YOU UNDERSTAND MORE.

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Explanation:



DNA: TTA CGC AAC TGG CTA ATT

mRNA: AAU GCG UGA CCG AUU AAC


Identify the type of mutation that occurred in the sequence above and evaluate the significance of these changes. (Will it have any problems in protein synthesis?)


Hint: 1st determine if it was copied to mRNA correctly. When you find the error, that is the mutation. 2nd use the chart if a different amino acid is created, this will determine if it will affect protein synthesis.

Answers

Answer:

See the answer below.

Explanation:

The correct mRNA sequence from the DNA according to the base pairing rule should be:

                       AAU GCG UUG ACC GAU UAA

Instead of:

                        AAU GCG UGA CCG AUU AAC

This thus means that some of the nucleotide bases have been wrongly substituted.

The most important change is the codon 'UUG' becoming 'UGA', while the former codes for the amino acid leucine, the latter represents a stop codon. A  stop codon will result in a non-functional or defective protein.

Hence, the type of mutation is nonsense mutation which results in a sudden cessation of protein synthesis as a result of a codon being prematurely changed to a stop codon.

The significance of this kind of mutation is that a defective on non-functional protein will result which will have a serious phenotypic implication in organisms.

The compass has advanced dramatically over the years, evolving into a
Global Positioning System (GPS). The GPS is a device that is simple to use
and gives a lot of information on your position.
Which is a positive effect of the technological advance of going from a
compass to a GPS?
O A. The GPS uses less electricity.
B. The GPS gives more accurate information
O C. The GPS is less expensive,
D. The GPS is easier to manufacture,

Answers

Answer: B

Explanation:

The GPS gives more accurate information .

What is GPS?

The Global Positioning System (GPS) is a U.S.-owned utility that provides users with positioning, navigation, and timing (PNT) services.

What are the 3 types of GPS?

Three types of GPS systems are:

Street navigation systemsSports GPS systems Phones with GPS

Hence, A is correct option

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How does the flu affect businesses and governments? Could it affect residents’ access to certain resources?

Answers

Answer:

Ofcourse it does

Explanation:

Imagine one person have flu and he or she goes to met someone who is healthy but when they talk other infected person's flu goes to other healthy person and that new infected person goes to another and they go to another and thats how it seperate. But we have solution for this the first infected person need to wear mask so that his or her flu don't pass out to anothers.

Rashida doesn’t think that skepticism should play an important role in the scientific process. She says that skepticism interferes with scientific consensus. Which statement best describes Rashida’s conclusion?
It is incorrect because skepticism helps scientists recognize when ideas are not supported by evidence.
It is correct because skepticism prevents the acceptance of creative ideas and new discoveries.
It is correct because skepticism prevents scientists from testing new ideas and communicating with other scientists.
It is incorrect because skepticism leads to the acceptance of new ideas, which can eventually gain scientific consensus.

Answers

Answer: b

Explanation: sorry if im wrong

Are enzymes in saliva a example of a structural adaption or physiological?

Answers

Answer:

structural adaptation

Answer:

Adaptational

Explanation:

It needs to adapt to the different variety of food and drinks.



Why are human populations not limited by the carrying capacity of their ecosystems?

Answers

Answer:

humans use their knowledge to locate resources.

Explanation:

The carrying capacity can be defined as the maximum number of individuals in a population of a species that an ecosystem or region can support on the basis of availability of water, food, habitat and other needs necessary for survival. Sometimes, the population of the species increases exponentially exceeding the carrying capacity of an ecosystem when the resources available are surplus.  

The human populations are not limited by the carrying capacity of their ecosystem this is because of the fact human beings possess special intellectual and thinking abilities which make them capable of availing themselves resources. They posses knowledge which allows them to search, and find resources even from the earth extreme locations not suitable for survival.

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The nucleus in both plant and animal cells “specializes” the cells so they can do different things- for example, a liver cell or a muscle cell do different things.  Thinking about plants or trees, what special functions might different cells in a tree or plant do?

Answers

Plant cells are the basic unit of life in organisms of the kingdom Plantae. They are eukaryotic cells, which have a true nucleus along with specialized structures called organelles that carry out different functions. Plant cells have special organelles called chloroplasts, which create sugars via photosynthesis. They also have a cell wall that provides structural support

Answer:

od21xef3

Explanation:ewwe

What is produced during the photosynthesis process?

A. Chloroplasts
B. Carbon Dioxide
C. Sugar

Answers

Answer:

Sugar

Explanation:

Photosynthesis is a process that certain organisms undergo. Plants, algae, and certain bacteria use this process to produce their own food. These organisms are called producers or autotrophs.

The equation for photosynthesis is:

carbon dioxide + water + light energy —-> glucose + oxygen

The plants turn carbon dioxide, water, and light energy from the sun into glucose and oxygen. The glucose, or sugar, becomes the food for the plant. The oxygen is the waste product.

The question asks us what is produced during photosynthesis.

Chloroplasts are not produced, but they are where photosynthesis takes place. Carbon dioxide is not produced, but it is used in the process. The correct answer is sugar. Sugar is produced, and it is the food for the organism.

Pleaseee help me out.

The T allele codes for tall stems in pea plants and the t allele codes for short stems. If T is
dominant and t recessive, what percentage of the offspring would you expect to have each
phenotype from a cross of Tt x tt?
a. 75**
tall and 25% short
b. 25% tall and 75% short
C. 50% tall and 50% short
d. 25% tall and 25% short

Answers

Answer:

50% tall and 50% short.

Explanation:

T t

t Tt tt

t Tt tt

where does the independent variable go on a graph

Answers

Answer:

SCIENTISTS like to say that the “independent” variable goes on the x-axis (the bottom, horizontal one) and the “dependent” variable goes on the y-axis (the left side, vertical one).

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Explanation:

What is gel electrophoresis used for?
O A. Cutting DNA into sections
O B. Separating strands of DNA
O C. Performing reverse transcription
O D. Cloning organisms

Answers

Answer:

B. separating strands of DNA

Gel electrophoresis used for separating strands of DNA

What is electrophoresis?

Electrophoresis can be defined as a technique used to separate molecules of DNA, RNA or protein molecules on the basis of their electrical charge and size

It also used to identify microorganismsIt is also used in genetic testingElectrophoresis analysis is used in forensics to compare DNA,

Below are four major components of gel electrophoresis:

DNA is extractedIsolation and amplification of DNADNA added to the gel wellsElectric current applied to the gel.

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A Veterinary doctor examined a sick cow. He examined that the cow showed Debilitation and weakness. What would the cow suffer from?​

Answers

Answer:

Fat Cow Syndrome

Explanation:



A medical test indicates that a patient has a defective protein. This

condition is most likely due to a change in the directions coded in the:


number of phosphate molecules

sequence of subunits in DNA

number of nitrogen bases

sequence of sugar molecules

Answers

Answer:

number of nitrogen bases

Explanation:

The correct answer would be the number of nitrogen bases.

A defective protein is usually caused by mutation, which is defined a change in the DNA sequence of an organism.

Mutation can occur in a variety of ways including:

1. Deletion of nucleotide base sequence in the DNA

2. Addition (insertion) of nucleotide base sequence in the DNA

3. Duplication of nucleotide sequence in the DNA

A change in number of phosphate molecules, sequence of subunits DNA and sequence of sugar molecules if possible in nature, do not lead to mutation if the change does not affect the sequence of DNA.

Hence, the correct option is number of nitrogen bases.

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What is a reasonable action that provides safer water for communities? Use the set of ordered pairs to determine whether the relation is a function. {(19,15),(25,0),(16,11),(2,12),(16,14),(13,20)}. Who were the first regular visitors to Oceania and why???? Please help Rick is planning to invest the following amounts at 7 percent: $254 at the end of year 1, $412 at the end of year 2, and $1,230 at the end of year 3. How much money will he have saved at the end of year 3 Forty adult men in the United States are randomly selected and measured for their body mass index (BMI). Based on that sample, it is estimated that the average (mean) BMI for men is 25.5, with a margin of error of 3.3. Use the given statistic and margin of error to identify the range of values (confidence interval) likely to contain the true value of the population parameter Factor the polynomial: x(6x - 1) 3(6x - 1)O A. -3x(6x - 1)O B. 3x(6x - 1)O C. (6x - 1)(x - 3)O D. (6x - 1)(x + 3) josue earned $56.25 fixing a coding issue with a popular website.it took him a total of 4.5 hours to fix the issue.The equation 4.5x=56.25 can be used to find Josue hourly rate.What is Josue hourly rate? minerals from several closely related species make up a Explain what the number 0 on the gauge represents and explain what the numbers above 0 represent A grocer wants to mix two kinds of candy. One kind sells for $1.80 per pound, and the other sells for $3.00 per pound. He wants to mix a total of 15 pounds and sell it for $1.95 per pound. How many pounds of each kind should he use in the new mix? (Round off the answers to the nearest hundredth.) how to ecosystem services affect human sustainability Erin had 55 stuffed bears. She took out her favorite 7 bears and then equally divided the other bears among her 3 sisters. Erin's youngest sister, Su, already had 15 stuffed bears. How many stuffed bears does Su have now? Charles is a stay-at-home parent who lives in New York City and teaches tennis lessons for extra cash. At a wage of $25 per hour, he is willing to teach 6 hours per week. At $35 per hour, he is willing to teach 16 hours per week. Using the midpoint method, the elasticity of Teresas labor supply between the wages of $25 and $35 per hour is approximately _________ , which means that Teresas supply of labor over this wage range is _________ What is the best example of electromagnetic energy in everyday life What does rationing means In history to wellWhich of theof the following is a way to usewater economicallya construction of bewrisb Rainwater harvestingc Drup irrigationd Infitration A class is made up of 2 boys and 12 girls. Half of the girls wear glasses. A student is selected at random from the class. What is the probability that the student is a girl with glasses What is the economics name of the extra money you have left over following creating your budget 17A property company received cash for property rentals totalling $738,400 during theyear to 31 December 2009. Figures for rent received in advance and rent in arrears atthe beginning and end of the year were as follows.31 December 200831 December 2009Rent received in advance125,30077,700Rent in arrears(all subsequently paid, no bad debts)39,60041,100What amount should appear in the company's income statement for the year ended 31December 2009 for rental income? z2 (z squared) when z = 0.7 help us out