A diploid cell undergoes meiosis to produce one egg and 3 polar bodies with 23 chromosomes each.
What happen during the egg formation?During egg formation in the ovary, Primary oocyte (diploid) having 46 chromosomes undergoes meiosis I to form one secondary oocyte and one first polar body.
Both the secondary oocyte and one polar body are haploid having 23 chromosomes. Both daughter cells then undergo meiosis II, the first polar body divides to give two polar bodies and the secondary oocyte divides by meiosis II to form one ovum.
Therefore, during egg formation in the reproductive system, a diploid cell (a primary oocyte) undergoes meiosis to produce one egg and 3 polar bodies with 23 chromosomes each.
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At one time, scientists classified fungi as non-photosynthetic plants. What is one characteristic of fungi that led scientists to realize that fungi are not plants?
a. Their cells do not contain nuclei.
b. Their cell walls contain chitin.
c. Some live in symbiotic relationships.
d. They reproduce both sexually and asexually.
Answer:
b
Explanation:
their cell walls contain chitin unlike plant cell walls which contain cell walls
Explain how the formation of a submergent coastline differs from the formation of an emergent
coastline.
Answer:
One occurs when sea level rises whereas the other happens when the sea level drops.
Explanation:
The main difference between Submergent coastlines and emergent coastlines because Submergent coastlines formed when sea level rises or in other words, the land sinks down. Examples of submergent coastlines are estuaries, barrier bars, and barrier island systems while on the other hand, emergent coastlines occurs when sea level drops or the land rises. Hudson Bay and Eastern Coastal Plains are the examples of emergent coastlines.
Question 5 of 10
Which is caused by the uneven heating of air?
A. Altitude
B. Wind
C. Humidity
D. Rain
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Answer:
B. Wind
Explanation:
Wind is the movement of air, caused by the uneven heating of the Earth by the sun and the Earth's own rotation. Winds range from light breezes to natural hazards such as hurricanes and tornadoes.
Explain the difference in How the tree and the fox get carbohydrates to use for energy
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Hmm... This seems to be a simple questions. Plants/trees actually make their own carbohydrates through photosynthesis. A fox simply eats food and that is their carbohydrate source. Please mark brianliest<3!
Which of the following is not true about renewable energy sources?
They do not pollute the air.
They can help save energy costs.
They do cause an increase in greenhouse gases.
They do not use up a finite supply of a resource.
Answer:
They do cause an increase in greenhouse gases.
Explanation:
Renewable resources are the resources that are available in abundance that do not have adverse effect to the nature. These resources are available in abundance and they are not subject to extension. They are also said to be known as clean energy. renewable energy is obtained by the renewable resources. The pollution is caused minimal and the energy is saved by the use of renewable resources.
Answer:
C. they do an increase in greenhouse gases
Explanation:
all prokaryotes are single-celled organisms. compare prokaryotes and eukaryotes. select the characteristics that only apply to prokaryotes.
•these cells contain membrane bound organelles.
•these cells have DNA contained in nucleus.
•these cells have DNA in a region called the nucleoid.
•some of these cells have structure like flagella and microvilli.
•these cells have cell walls made of polypeptides and polysaccharides.
•these cells have cell walls made of cellulose.
These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Answer:
These cells have DNA in a region called the nucleoid.
-Some of these cells have structures like flagella and microvilli.
-These cells have cell walls made of polypeptides and polysaccharides.
Explanation:
What is a pioneer species? (Will give brainiest)
Answer:
The first species to colonize an ecosystem that is previously damaged or disrupted. Supplement. Pioneer species is the first to colonize an ecosystem previously disturbed or damaged. For example, sand that has become barren is colonized by a pioneer species of lyme grass (Leymus arenarius)
Explanation:
How are the melting and boiling point of steel pot useful to us
Answer:
Explanation:
Pot metal is generally used for parts that are not subject to high stresses or torque. Items created from pot metal include toys, furniture fittings, tool parts, electronics components, automotive parts, inexpensive jewelry.
The melting and boiling point of steel pot useful to us as it can be changed via need of product.
Pot steel is normally used for elements that aren't concern to excessive stresses or torque. Items constituted of pot metallic consist of toys, fixtures fittings, device elements, electronics components, automobile elements, less expensive jewelry.
What is boiling factor ?
The boiling factor of a liquid varies in keeping with the carried out strain; the everyday boiling factor is the temperature at which the vapour strain is identical to the same old sea-degree atmospheric strain (760 mm [29.92 inches] of mercury). At sea degree, water boils at 100° C (212° F).
Thus it is well explained.
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The graph below shows the population of mice living in a certain area over fifteen years Which numeral on the graph points to a time when the birth rate exceeded the death rate of the mice?
I
II
III
IV
Answer:
I
Explanation:
In section I, the graph has a positive slope.
Birth rate - death rate = positive, the birth rate is more than the death rate
Sections II and IV have a balanced population where the birth and death rate are the same
In section III the death rate exceeds the birth rate
The numeral I on the graph points to a time when the birth rate exceeded the death rate of the mice.
What is death rate?The mortality rate, also known as the death rate, is a measure of the number of deaths in a given population per unit of time, scaled to the population's size.
The birth rate is the number of people born in a population in a given period of time. The number of people born per year per 1000 in the population is referred to as the human birth rate.
In section I, the graph has a positive slope. Birth rate and death rate difference is positive here, it means the birth rate is more than the death rate.
Sections II and IV have a balanced population with the same birth and death rates. Section III has a higher death rate than a higher birth rate.
Thus, the answer is numeral I.
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Why do negative essay results not always mean Michael is absent
Answer:
I think you mean molecule not Michal so the answer is: the concentration of the molecule may be too low to be detected
Explanation:
For each phrase below, choose the most appropriate key term from the list above
a. The improper or unsafe use of a drug
b. A drug that is inhaled as vapors
c. a drug that temporarily increases energy and alertness
d. drug withdrawal occurring in newborn infants
e. laboratory made drugs that closely resemble common illegal drugs in chemical structure and effect
f. a drug that slows the body and the brain
Answer:
a. Drug abuse
b. Inhalants
c. Stimulants
d. Neonatal abstinence syndrome
e. Club designer drugs
f. Depressants
Explanation:
Drug abuse can be defined as the excessive use of drugs that can be harmful to the individual or to others, which is associated with social, behavioral, physical and job-related problems. Inhalants drugs (e.g., glue, cocaine) are volatile drugs whose inhalation may induce psychoactive and/or mind-altering effects. Stimulant drugs (e.g., cocaine, amphetamines) are drugs that excite body functions by accelerating the activity of the central nervous system (CNS), while depressant drugs (e.g., alcohol) slow down the CNS. Neonatal abstinence syndrome occurs when a neonate withdraws from certain drugs (usually opioid drugs which interact with opioid receptors) to which he/she was exposed before birth. Finally, designer drugs (e.g., ecstasy, ketamine, LSD) are drugs synthesized in illegal labs which are commonly known as “club drugs” because they are often used and sold in nightclubs.
Why did Gregor Mendel use peas in his experiments?
Peas grow very slowly.
Pea reproduction cannot be controlled.
Peas normally produce very few offspring.
Peas have characteristics that have two forms.
Answer:
He used peas because they are self pollinating,they grow fast,and they have many traits
Answer:
D. Peas have characteristics that have 2 forms
Explanation:
Edge 2022.
Which genotype represents a heterozygous?
hh
HH
Hh
An organism with one dominant allele and one recessive allele is said to have a heterozygous genotype. This would be Hh.
Answer:
Hh
Explanation:
Hh genotype represents a heterozygous.
When ocean water freezes this leaves behind water that is saltier and denser.
True or false ?
Answer:
trye
Explanation:
it just is
what is the primary source of engery in a food chain ?
How many amino acids must be obtained in the diet because they cannot be made by the body?
2
5
10
20
amino acids we obtained in the diet about 10
7. What biological process occurs after there has been a disturbance such as a flood, or a tornado-in an established ecosystem?
Answer: Ecological disturbance, an event or force, of nonbiological or biological origin, that brings about mortality to organisms and changes in their spatial patterning in the ecosystems they inhabit. Disturbance plays a significant role in shaping the structure of individual populations and the character of whole ecosystems.
Explanation: Source where I got the answer from: https://www.britannica.com/science/ecological-disturbance
You can copy the link and paste.put it in the search and click and there you go.
what caused the earth to separate into layers
Answer:
When the inside of the Earth was liquid, gravity caused the heavier elements nickel and iron to sink to the center. Lighter elements floated to the surface. Over time this process caused the Earth to separate into layers.
Explanation:
help please
answer these questions and give the reasoning
Answer:
can i see the question plz so that I can help you
in which country green rain fell upon?
Answer:
In India ,Kolkata green rain fell.
I hope it helps
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Answer:
The country in which green rain fell upon is
India.(kolkatta)
The
store(s) more carbon than the atmosphere.
O rock
trees
oceans
Osoil
Answer:
Oceans
The oceans are a massive carbon sink, and part of the positive reinforcement of the greenhouse gas cycle is that, as the oceans become warmer, then tend to release more carbon dioxide dissolved in the water which in turn drives temperatures warmer.
Mushrooms are a type of fungus. What characteristic of fungi makes them different from plants?
A. Fungal cells are eukaryotic.
B. Fungi are multicellular.
C. Fungi are heterotrophic.
D. Fungi have cell walls.
Answer:
C. Fungi are heterotrophic.
Explanation:
Mushrooms are a type of fungus. Fungi are heterotrophic, this characteristic of fungi makes them different from plants.
The principal reason we consider tunicates similar to the ancestor of all chordates is that Select one: a. tunicates have a lophophore-style mouth. b. tunicate adults are very similar to the ancestors of cephalochordates and vertebrates. c. tunicate larvae are primitive in all of their features. d. tunicate larvae possess the synapomorphies of adult chordates and thus reveal close evolutionary relationships with chordates. e. the body plan of adult tunicates parallels that of chordates.
Answer:
d. tunicate larvae possess the synapomorphies of adult chordates and thus reveal close evolutionary relationships with chordates.
Explanation:
In evolutionary biology, a synapomorphy is a shared, derived character/trait which is present in an ancestor and its descendants. Synapomorphies are useful markers to establish phylogenetic relationships between sets of taxa. Tunicates (subphylum Tunicata) are sessile marine invertebrates that are considered chordates (phylum Chordata) because the larval stage has characters/traits that are similar to other chordates. Larval tunicates have a nerve cord, a notochord, tail and gill slits (conserved in adults).
Which of the following statements accurately describes the rock cycle?
Question 1 options:
A. Sedimentary, igneous, and metamorphic rocks are formed and broken down
B. The rock cycle only describes the formation of rocks, not the transportation or deposition
C.The rock cycle only describes the formation of rocks above ground
D.The rock cycle only describes how igneous rocks are formed
Answer: The Answer would be A
Explanation:
The arrows in a food chain show: a Who eats who b Heat energy being lost c The movement of energy between organisms d The route of food to the shops
Answer:
c The movement of energy between organisms
Explanation:
Pyramid of energy is a model used to depict the flow of energy from one trophic level or feeding level to the next in an ecosystem. It's a diagram that compares the energy used by organisms at each trophic level of the food chain. The pyramid of energy must never be inverted or turned upside down.
The units used in the construction of pyramids of energy is kilocalories (kcal) or energy per area per time (Jm-²year-¹).
This ultimately implies that, the arrows in a food chain show the movement of energy between organisms such as from producers which are autotrophs or self-feeders such as plants to the tertiary consumers.
Furthermore, a list of the types of organisms in an eco pyramid are;
I. Producers: these are autotrophs or self-feeders such as plants.
II. Primary consumers: these are herbivores that typically feed on plants such as a goat or deer.
III. Secondary consumers: these consists of carnivores that typically feed or eat flesh such as lion, tiger, cheetah, etc.
IV. Tertiary consumers: these are higher predators such as humans that aren't normally fed on by other organisms in the ecosystem.
Answer: The arrows in a food chain show (The movement of energy between organisms). The correct option is C.
Explanation:
In an ecosystem, a food chain shows the transfer of energy and nutrients ( food) from organisms to organisms in a feeding pathway. Instead of giving functional group names such as primary producer, primary consumer and so on, in a good chain, the organism at each step is identified. Thus,
Grass-------> Zebra ---------> lion
(Primary (Primary ( secondary
producer). consumer) consumer)
this is an example of a simple food chain in a grassland ecosystem. This ARROWS represented above shows the direction of energy flow through an ecosystem.
Furthermore, the grass traps solar energy and stores it as chemical energy in the food made during photosynthesis. When eaten by Zebra, which is the primary consumer, the energy stored in the grass is transferred to the consumer. This transfer is inefficient as some of the stored chemical energy is lost as heat. When the zebra is eaten by a Lion,which is the secondary consumer.
The cell membrane controls what enters and leaves the cell. Which of the
structures in the diagram below is the cell membrane?
E
F
B
Ο Α.Ε
OB. A
Ос. В
ODC
C shows the structure of the cell membrane
What would happen if there were no greenhouse gases to trap heat?
Answer:
The Earth would be covered in ice and be about -18°C in temperature.
Explanation:
Greenhouse gases in the air, mainly carbon dioxide, methane and water vapour, trap radiation from the Sun and work as a thermal blanket around the planet. Without the Greenhouse effect, the Earth would be ice-cold.
What is the function of hemoglobin?
A. to carry oxygen
B. to carry carbon dioxide
A. To carry oxygen
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It is projected that an increase in carbon dioxide levels in the atmosphere will MOST LIKELY lead to _____.
Select one:
a. lower-than-average hurricane rates
b. higher-than-average ice levels in arctic
c. higher-than-average sea levels
d. lower-than-average ocean temperatures
Is photosynthesis the ONLY driver for cycling matter and energy in ecosystems? yes or no
Do not play on my question please.