GIVING , ⓉⒽⒶⓃⓀⓈ and
1. The spores on a fern are found:
in the fruit
in the roots
under the leaves
inside the flowers
2. Fern spores usually form during:
spring
winter
summer
fall
3. Why must the plant which grows directly from the fern spore be wet?
in order to produce a seed
so that the egg can be fertilized
so that it can grow
4. Spores are formed in:
ovaries
spore cases
anthers
5. Ferns grow by:
photosynthesis
reproduction
mitosis
6. How do spores help sustain the population of ferns?
Spores do not have any natural predators.
There are million of spores that are made by a single plant to help keep its population.
Spores can hide under rocks for long time before maturing into an adult plant.
Spores can live for a long time without maturing into an adult plant.
7. Choose all the right answers.
When the leaf of a fern touches the ground, it may produce a new plant:
by planting a spore
by vegetative reproduction
by growing roots at the point of contact
by budding from its stem
Answers
Answer:
1: C. They are found contained in a casing, called sporangia, and grouped into bunches, called sori, on the underside of the leaves.
2: C. The sporophyte generally releases spores in the summer. Spores must land on a suitable surface, such as a moist protected area to germinate and grow into gametophytes.
3: B: Moisture is needed for germination, growth and fertilization and high humidity for prothalli and young developing ferns after fertilization.
4: B. In ferns, spores are contained within cases called sporangia that are located on the underside of leaves.
5: C. Each spore grows into a photosynthetic prothallus (gametophyte) via mitosis. Because mitosis maintains the number of chromosomes, each cell in the prothallus is haploid.
6: D. the reason why that's the answer is because I read a national geographic paper and it said that spores can live for over a million years without maturing into an adult plant .
7: A and B. Walking fern also has another, asexual, way of reproducing. If the long extended leaf tip touches soil, a new plantlet can form at the tip, produce roots, and become a new plant. The new plant can then grow a long leaf which touches the ground and sprouts another plantlet. In this way the colony gets larger and larger.
I hope this helped, have a great day! :)
Related Questions
Why does assortment of genes take place in meiosis 1.
Answers
Answer:
During meiosis, the pairs of homologous chromosome are divided in half to form haploid cells, and this separation, or assortment, of homologous chromosomes is random. This means that all of the maternal chromosomes will not be separated into one cell, while the all paternal chromosomes are separated into another.
The closest star to the Sun is Alpha Centauri. Alpha Centauri is about 4.12 × 1016 meters away from the Sun.
The mass of the Sun is approximately 2.00 × 1030 kilograms. The mass of Alpha Centauri is slightly greater than this, at 2.19 × 1030 kilograms.
What is the magnitude of the gravitational force of attraction between these two stars?
A.
1.72 × 1017 newtons
B.
1.15 × 1024 newtons
C.
1.51 × 1038 newtons
D.
3.55 × 1033 newtons
Answers
The magnitude of the gravitational force of attraction between the Sun and Alpha Centauri is 1.15 × \(10^{24}\) newtons. Therefore, option (B) is correct.
\(F = G * (m1 * m2) / r^2\)
where:
F is the gravitational force of attraction
G is the gravitational constant (approximately 6.67 × 10^-11 N(m/kg)^2)
m1 and m2 are the masses of the two objects
r is the distance between the centers of the two objects
Plugging in the given values:
\(F = (6.67 * 10^}-11} N(m/kg)^2) * (2.00 * 10^{30} kg) * (2.19 * 10^{30} kg) / (4.12 * 10^{16} m)^2\)
Calculating this expression gives us:
F ≈ 1.15 × \(10^{24}\) newtons
Therefore, the correct option is B. 1.15 × \(10^{24}\) newtons.
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Which statement best describes antigenic variation of a parasite?
a) Parasites can change their antigens or create novel antigens.
b) Parasites do not have any surface antigens.
c) Parasites are ingested by macrophages, and antigens are denatured.
d) Parasites have similar host antigens.
Answers
The statement that best describes antigenic variation of a parasite is: a) Parasites can change their antigens or create novel antigens.
Antigenic variation refers to the ability of parasites to change their antigens or create new ones. This process is essential for the survival and evasion of the immune system by the parasite. By altering their antigens, parasites can avoid detection and clearance by the host's immune response.
Parasites have evolved sophisticated mechanisms to undergo antigenic variation. They can modify the surface proteins or switch between different antigenic variants. This variation can occur through genetic recombination, gene duplication, or mutation, allowing the parasite to constantly present a different antigenic profile to the immune system.
The ability of parasites to change their antigens or generate novel antigens poses a significant challenge in the development of effective vaccines and treatments. Since the antigens expressed by the parasite can change over time, the immune system may struggle to mount a targeted and long-lasting immune response.
Understanding antigenic variation is crucial in the study of parasitic infections and the development of strategies to control and treat them. By targeting conserved antigens or finding ways to disrupt the antigenic variation mechanisms, researchers aim to develop interventions that can effectively combat parasitic diseases.
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what type of mutation causes sickle cell anemia?
A. neutral
B. point
C. silent
D. frameshift
Answers
Answer:
B. point
Explanation:
The type of mutation that causes sickle cell anemia is a point mutation. Specifically, it is a single nucleotide substitution in which adenine is replaced by thymine in the beta-globin gene, resulting in a change from glutamic acid to valine in the hemoglobin protein. This mutation causes the hemoglobin molecules to stick together and form stiff, sickle-shaped red blood cells, which can lead to various health problems.
What are the base pairs that are found in DNA?
Answers
How many millimetres of rain falls in London in May?
Answers
Answer: 58.4mm
Explanation:
It rains on fewer days in every month throughout the year than the rest of the UK, and rainfall totals are less in every month, with the driest month, May, averaging 58.4 mm
Do you think the challenge society faces with regard to feeding the world's growing population is an example of ecological carrying capacity? Why or why not?
Answers
Answer: Yes
Explanation:
Carrying capacity can be defined as the total number of members of the population of a species that an ecosystem can sustain in terms of providing resources in the form of food, shelter and others. When the resources are available in surplus then the population of a species increases exponentially but declines when resources become scarce. The human population is increasing tremendously all over the world this is supported by the resources like food, water, fossil fuels, air, minerals, and others. But some of these resources are decreasing due to overuse and may not be available in future to sustain the future generation.
Ecological carrying capacity is a tool that is becoming indispensable for society today, to be able to answer the question we need to know that.....
The ecological carrying capacityThe ecological carrying capacity is defined as the number of visitors or visits an area can sustain without degrading natural resources. The social carrying capacity refers to level of recreational use where the fulfillment expectations of visitor experiences are not threatened because of crowding or misbehavior of other visitors. Most professionals agree that both ecological and social carrying capacity factors must be considered for effective area planning and management. For managerial applications, it is essential to learn about the
User attitudes User preferences and Site use impacts relating to management objectives.With this information, we can say that the answer is yes, society needs to overcome this challenge of planning available resources and the behavior of individuals.
Why ecological carrying capacity, it is necessary that measures be taken in advance for a better quality of life and resources in the place to be visited, in this way to overcome the challenge of modern society against the growth of population in the world.
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Un paciente que tiene la temperatura corporal en 38,6 c°, ¿qué necesidad alterada tiene? Oxigenación. Homotermia. Circulación. Eliminación.
Answers
Answer:
Homotermia
Explanation:
La homotermia es la capacidad de un ser vivo para regular y mantener constante su temperatura. En humanos, la temperatura corporal normal es de alrededor de 37°C. Por lo tanto, si el paciente tiene una temperatura corporal superior (38,6°C), tiene alterada la homotermia.
Question 7
All living things are made of cells.
Lion
True
False
Answers
Answer:---
True. Cell theory makes three major assertions: 1. All living things are made of cells. 2. Cells are the smallest unit of life. 3. Cells can only...
Think about why the worms were able to regenerate. The cut caused some damage but what happened to allow them to regrow their missing pieces. Use these terms in your reasoning: stem cell, regeneration, and differentiation.
Answers
Worms were able to regenerate because they possess a unique ability called regeneration. Regeneration is the process by which organisms can replace or regrow lost or damaged body parts. In the case of worms, this regrowth is facilitated by the presence of stem cells in their bodies.
Stem cells are undifferentiated cells that have the potential to differentiate into different specialized cell types. In the context of regeneration, these stem cells play a crucial role. When the worms are cut or damaged, the stem cells near the injury site are activated. These stem cells undergo a process called differentiation, where they transform into specific cell types that are required to rebuild the missing or damaged tissues.
Through this process of differentiation, the stem cells in worms can generate new cells that can replace the missing pieces. These new cells can then develop into the necessary tissues, organs, or structures to restore the organism's body integrity. This regenerative ability is a remarkable feature of worms and is driven by the presence of stem cells and their ability to differentiate into the required cell types for tissue repair and regrowth.
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HELP ASAP PLEASE
Which non-mineral nutrient is essential for photosynthesis?
- Hydrogen
- Potassium
-Nitrogen
- Carbon Dioxide
Answers
Answer:
Hydrogen
Explanation:
Hydrogen is the non-mineral nutrient, that is essential for photosynthesis.
Carbon, Oxygen and Hydrogen are the non-mineral nutrients.
Explanation: Plants breathe in CO2, therefore being essential, I learned this the hard way
Dissociative disorders usually develop as a(n)
Answers
jane accidentally closed the car door on her finger. the nail on that finger eventually fell off and one year later that nail grew back distorted. what nail structure has possibly been permanently damaged?
Answers
Answer:
It is likely that the nail matrix, also known as the nail root, has been permanently damaged.
Explanation:
The nail matrix is the area at the base of the nail where new cells are produced that eventually become the nail plate. If this area is damaged, it can cause the nail to grow back distorted or deformed.
11. Which statement is a fundamental principle of the cell theory?A. All cells have a plasma membrane.B. Eukaryotic cells are larger than prokaryotic cells.C. Living organisms are composed of cells.
Answers
Cell theory
Even though all three options have correct information, the cell theory holds, as the main core of ideas, that all living organisms are composed of cells (option C).
which of the following drugs can cause syndrome of inappropriate antidiuretic hormone (siadh)?
Answers
Carbamazepine can cause syndrome of inappropriate antidiuretic hormone (SIADH).
The syndrome of inappropriate antidiuretic hormone (SIADH) is a condition characterized by excessive release of antidiuretic hormone (ADH), leading to water retention and dilutional hyponatremia. Several drugs have been associated with the development of SIADH, but among the options given, carbamazepine is known to be capable of causing this syndrome.
Carbamazepine is an anticonvulsant medication used to treat various conditions, including epilepsy and neuropathic pain. It has been reported to induce SIADH in some individuals. The exact mechanism by which carbamazepine triggers SIADH is not fully understood, but it is thought to involve the drug's effect on ADH release and renal water handling.
On the other hand, ibuprofen, vitamin C, and omeprazole are not known to cause SIADH. Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) commonly used for pain relief and inflammation. Vitamin C is a water-soluble vitamin, and omeprazole is a proton pump inhibitor used to reduce stomach acid production. There is no evidence linking these medications to SIADH development.
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The complete question is:
Which of the following drugs can cause syndrome of inappropriate antidiuretic hormone (SIADH)?
CarbamazepineIbuprofenVitamin COmeprazoleAmniocentesis and chorionic villus sampling allow for ________ and ________ of the fetus so that it can be tested for abnormalities.
Answers
Amniocentesis and chorionic villus sampling allow for genetic abnormalities and sex of the child of the fetus so that it can be tested for abnormalities.
What is Amniocentesis?Prenatal testing using amniocentesis is often carried out in the second or third trimester of pregnancy.
It can identify some genetic and chromosomal disorders, including Down syndrome (such as cystic fibrosis). Your healthcare practitioner will do an amniocentesis during which they will take a small sample of amniotic fluid from the sac around the fetus. The fluid sample is then examined in a lab.
The fetus develops inside the amniotic sac throughout pregnancy. The fetus is encased and shielded by amniotic fluid inside the amniotic sac. Additionally, some of the fetus' cells are present.
Therefore, Amniocentesis and chorionic villus sampling allow for genetic abnormalities and sex of the child of the fetus so that it can be tested for abnormalities.
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study the graph and answer the question
Answers
Answer:
Here is the answer
Explanation:
The deer population increased but steadily from around 1800-1825. The deer population started increasing dramatically from 1825. After around 1860, the deer population remained around constant and didn't change dramatically.
Which choice describes a community?
a forest of birds, insects, and squirrels
a desert of sand, rocks, hawks, and snakes
a hole in which a snake lives
the desert
Answers
Answer:a forest of birds, insects, and squirrels
Explanation: A community consists of only biotic (living) factors with multiple different populations (different groups of animals)
now you’ll examine an operon that undergoes negative and positive control. the ara operon in e. coli codes for enzymes that metabolize the sugar arabinose, which e. coli can use for energy. as you can see in the diagram, the regulatory protein arac can act as both an activator and a repressor of the ara operon.
Answers
The lac operon is known to be able to undergoes negative and positive control.
The diagram based on the 4 table arrangement is filled up below (Right to left);
In the presence of arabinose: initiator, activator, yes, yes.In the absence of arabinose: initiator and operator, repressor, no, no.
If a mutation prevents arabinose from biding to AraC: initiator and operator, repressor, no, no.
If arabinose is present but a mutation and AraD enzyme renders it non-functional: initiator, activator, yes, no.
The metabolism of the sugar arabinose is known to be influenced by an operon that is said to undergo both positive control and negative control.
Transcription of the ara operon is lead by the regulatory protein AraC, which then bound to the DNA.
When arabinose is present, it binds to AraC, and both parts of the AraC dimer are then also bound to the initiator, making transcription to move foreword.
When arabinose is absent, one part of the AraC dimer is often bounded to the initiator, while the other part is bounded to the operator, thereby hindering transcription.
See full question below
Now you'll examine an operon that undergoes negative and positive control. The ara operon in E. coli codes for enzymes that metabolize the sugar arabinose, which E. coli can use for energy. As you can see in the diagram, the regulatory protein AraC can act as both an activator and a repressor of the ara operon.
Use the diagram above to fill in the table.
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Create a appropriate title for this data table
Answers
Answer:
grade per hours of study
A scientist determined the rate of an enzyme-catalyzed reaction by measuring the amount of product formed over time. The following curve was generated from the data collected. What is the most likely explanation for the change in the slope of the line between 4 and 6 minutes?.
Answers
A large amount of substrate had been consumed between 4 and 6 minutes, the line's slope changes.
What is an example of an enzyme-catalyzed reaction?The zymase enzyme converts glucose into ethyl alcohol, which is then produced together with carbon dioxide. Starch to maltose conversion: Diastase is the enzyme responsible for the conversion of starch to maltose. A series of processes, including non - covalent interactions substrate binding, geometric rearrangements of the enzyme in its bound state.
What characteristics differentiate an enzyme-catalyzed reaction?At its ideal temperature, a catalyst performs at the highest level of efficiency. At either side of the optimal temperature, the activity of the biological catalysts decreases. The pH of a solution is important for biochemical catalysis.
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classify each of the objects of the solar system as planet, dwarf planet, or small solar system body.
Answers
Answer:
There are four main categories of classifications when determining the type of celestial body an object is. These classifications are: terrestrial planets (Mercury, Venus, Earth, and Mars), gas giants (Jupiter and Saturn), ice giants (Uranus and Neptune), and dwarf planets (Pluto, Eris, Haumea, and Makemake)
Explanation:
PLEASE GIVE ME BRAINLIEST
Which of the following is true about why we eat? Choose all that apply
We need to eat so we can create waste products.
We need building blocks for our body.
We need to eat so we can reduce our levels of oxygen.
We need fuel.
Which option^ help
Answers
We eat food for several reasons, and two of them are for building blocks for our bodies and for fuel. The second and last options are correct.
Food provides us with energy in the form of calories, which are essential for the functioning of our cells, tissues, and organs.
Our food provides essential nutrients such as proteins, carbohydrates, fats, vitamins, and minerals. These nutrients are necessary for our body's growth, maintenance, and repair. Proteins are the building blocks of our body tissues, while carbohydrates and fats provide energy and support various bodily functions.
The energy obtained from food is utilized for various physiological processes, such as metabolism, movement, and maintaining body temperature.
While digestion and metabolism do produce waste products, such as carbon dioxide and urea, creating waste products is not the primary purpose of eating.
Food provides us with essential nutrients, including proteins, carbohydrates, fats, vitamins, and minerals, which serve as building blocks for our body's growth, repair, and maintenance.
Eating does not directly impact the levels of oxygen in our bodies. Oxygen is primarily obtained through the process of breathing, and the consumption of food does not play a role in reducing oxygen levels.
Thus, the second and last options are correct.
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Which is a density-independent factor?
Answers
Explanation:
Density-independent factors, in ecology, refer to any influences on a population's birth or death rates. Examples are; weather and climate. They influence population sizes regardless of the population's density.
Answer:
Density-independent factors, such as weather and climate, exert their influences on population size regardless of the population's density. In contrast, the effects of density-dependent factors intensify as the population increases in size.
Explanation:
Can someone tell me if I explained this right?
I'll give brainliest :}
Background info: Potato cells are placed in different levels of NaCl.
Answers
Thinking about Mendel’s earlier studies, does the gene that determines the shape of a seed have anything to do with the seed color? (Explain your answer and name the law that supports it)
Answers
Answer:
Yes.
Explanation:
Yes, the gene that is responsible for the shape of a seed have also affect on the seed color because the dominant allele or gene appears in the shape and physical features of the offspring. Dominant allele is the gene that is responsible for the appearance of physical characteristics of an organism. Mendel's laws of inheritance are the laws which support the above phenomenon.
Yes, the gene determines the shape of a seed and seed color.
What is Phenotype?This is defined as the physical and observable trait of an organism. It is controlled by dominant and recessive allele.
When it is a dominant allele, the characteristics are visible in the organisms. Seed shape and color are physical traits which is why the answer was chosen.
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The adaptations of a pelican include its long, pouch-like beak. Why is the beak of the pelican an example of an adaptation?
A.
The beak is a unique feature that is found only in pelicans.
B.
All birds have beaks, but the beaks vary among different species.
C.
The shape and structure of the beak have remained the same over many generations.
D.
The shape and structure of the beak are inherited and help the pelican survive in its environment
Answers
Answer:
D. The shape and structure of the beak are inherited and help the pelican survive in its environment
Explanation:
Hope this helps!
i really need help with this.
Answers
Ellie loves to canoe out at Sebago Lake. One summer day she went out on the water and gave her dad a call
on her cell phone to let him know she was okay. Although she was comfortable out on the water, her dad,
back on land, was suffering tremendously from the heat. Explain why Janet felt cooler than her dad, even
though they were within a mile of each other.
Answers
Analyze the diagram below. Which of the terms best describes it?
Answers
Answer:
disaccharides
Explanation:
they are formed by linking 2 monosaccharides through condensation
monosaccharides are simple sugars or glucose
Disaccharides are those types of carbohydrates that, when hydrolyzed by acids or enzymes, produce two molecules of monosaccharides that may or may not be identical. Thus, option A is correct.
What is important in formation of disaccharides?Mono- and disaccharides, sometimes known as sugars, make up a significant portion of the carbohydrates included in food.
Disaccharides function similarly to other carbohydrates as a source of energy for the body.
When we consume foods containing disaccharides, our systems convert them into monosaccharides, or simple sugars, for absorption in the small intestine.
This condensation process is also referred to as a dehydration reaction, since a water molecule is released during this process.
Therefore, disaccharide is formed from monomeric subunits.
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