What is the main purpose of the seeds in plants that have them?

Mosses and liverworts (Bryophytes):

- Example: Mosses (e.g., Sphagnum moss) and liverworts (e.g., Marchantia)

- Vascular tissue: No true vascular tissue (lack xylem and phloem)

- Dominant structure: Gametophyte generation is more dominant in structure

- Other characteristics:

  1. Lack of true roots, stems, and leaves; instead, they have rhizoids.

  2. Reproduce via spores and require water for fertilization.

Ferns and relatives (Pteridophytes):

- Example: Ferns (e.g., Polypodium) and horsetails (e.g., Equisetum)

- Vascular tissue: Have true vascular tissue (xylem and phloem)

- Dominant structure: Sporophyte generation is more dominant in structure

- Other characteristics:

  1. Reproduce via spores produced in structures called sporangia.

  2. Exhibit well-developed leaves called fronds and often have underground stems (rhizomes).

Conifers (Gymnosperms):

- Example: Conifers such as pine trees (e.g., Pinus) and spruces (e.g., Picea)

- Vascular tissue: Have true vascular tissue (xylem and phloem)

- Dominant structure: Sporophyte generation is more dominant in structure

- Other characteristics:

  1. Produce seeds in cones.

  2. Typically have needle-like or scale-like leaves and are often evergreen.

Flowering plants (Angiosperms):

- Example: Flowering plants include roses (e.g., Rosa), sunflowers (e.g., Helianthus), and oak trees (e.g., Quercus)

- Vascular tissue: Have true vascular tissue (xylem and phloem)

- Dominant structure: Sporophyte generation is more dominant in structure

- Other characteristics:

  1. Produce flowers for sexual reproduction.

  2. Seeds are enclosed within fruits.

  3. Have a wide range of forms, from small herbs to large trees.

Please note that the examples provided are just a few representatives of each plant group, and there are many more species within each group.Mosses and liverworts (Bryophytes):

- Example: Mosses (e.g., Sphagnum moss) and liverworts (e.g., Marchantia)

- Vascular tissue: No true vascular tissue (lack xylem and phloem)

- Dominant structure: Gametophyte generation is more dominant in structure

- Other characteristics:

  1. Lack of true roots, stems, and leaves; instead, they have rhizoids.

  2. Reproduce via spores and require water for fertilization.

Ferns and relatives (Pteridophytes):

- Example: Ferns (e.g., Polypodium) and horsetails (e.g., Equisetum)

- Vascular tissue: Have true vascular tissue (xylem and phloem)

- Dominant structure: Sporophyte generation is more dominant in structure

- Other characteristics:

  1. Reproduce via spores produced in structures called sporangia.

  2. Exhibit well-developed leaves called fronds and often have underground stems (rhizomes).

Conifers (Gymnosperms):

- Example: Conifers such as pine trees (e.g., Pinus) and spruces (e.g., Picea)

- Vascular tissue: Have true vascular tissue (xylem and phloem)

- Dominant structure: Sporophyte generation is more dominant in structure

- Other characteristics:

  1. Produce seeds in cones.

  2. Typically have needle-like or scale-like leaves and are often evergreen.

Flowering plants (Angiosperms):

- Example: Flowering plants include roses (e.g., Rosa), sunflowers (e.g., Helianthus), and oak trees (e.g., Quercus)

- Vascular tissue: Have true vascular tissue (xylem and phloem)

- Dominant structure: Sporophyte generation is more dominant in structure

- Other characteristics:

  1. Produce flowers for sexual reproduction.

  2. Seeds are enclosed within fruits.

  3. Have a wide range of forms, from small herbs to large trees.

Please note that the examples provided are just a few representatives of each plant group, and there are many more species within each group.

Explanation:

Deoxyribonucleic acid (DNA)is a molecule composed of two polynucleotide chains that coil around each other and growth is the increase of size in a child while development is the process in which a child develops his or her skills

Answer: A. Infiltration

Explanation: Infiltration is defined as the flow of water from above ground into the subsurface.

Answer:

sublingual and buccal routes

Answer:

Cranial nerve 7 and YES the lesion is within the Central Nervous System.

Explanation:

The Central Nervous System ( CNS) consists of the brain and the spinal cord. There are 12 pairs of cranial nerves originating from the nuclei in the inferior surface of the brain, some sensory, some motor and some mixed.

Cranial nerve 7 is also known as the Facial nerves. These nerves are composed of both motor and sensory nerve fibre, arising from nuclei in the lower part of the pons. The motor fibres supply the muscles of facial expression. When lesion occurs at the base of the pon which is part of the CNS, it can affect the facial expressions such as observed, that the left corner of the mouth cannot be elevated in a normal fashion.

Therefore, Cranial nerve 7 ( Facial nerve) is involved in this facial control issue and YES the lesion is within the Central Nervous System.

Answer:

here u go

Explanation:

The embryo's cells express different genes at different times for each structure.

Answer:

behavior is an action that can be observed and measured

Answer:

Explanation:

D

Based on the given diagram, the correct answer is (D) Less energy is released by a reaction with an enzyme.

Enzymes are biological catalysts that increase the rate of chemical reactions by lowering the activation energy required for the reaction to proceed. In other words, enzymes facilitate reactions by reducing the amount of energy needed for the reactants to transform into products.

The black line in the diagram represents a reaction without an enzyme, where the reactant requires a higher amount of energy to reach the transition state and convert to the product. As a result, more energy is released during the reaction.

Therefore, the correct statement is that D) less energy is released by a reaction with an enzyme.

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Answer and explanation:

a) Spore - N:  The adult diploid vegetable (2n) produces spores (n) by meiosis, which is why we call it sporophyte (spore producer).

b) Calyptra - 2N: Calyptra is an enlarged archegonian belly that protects the capsule containing the embryonic sporophyte. Calyptra are normally lost before the spores are released from the capsule.

c) Egg - N: Eggs are structures present in the ovary of plants, that implies that they are part of the gametophyte.

d) Protonema - 2N: The protonema is a cell body that gives rise to the gametophyte, in other words, the protonema is a young gametophyte, and like the gametophyte, it has 2N ploidy

e)  Arquegonium - 2N: Female sexual organ (gametangium), bottle-shaped, characteristic of bryophytes, pteridophytes and most gymnosperms, as part of the reproductive structure, its ploidy is 2N

f)  Paraphysis - N: Sterile hyphae of the fruiting body (fertile spore-bearing layer) of several ascomycete fungi. They are part of the gametophyte (surrounding the antheridia and archegonium).

g) Zygote - N:  From the fertilization of the gametes, the diploid zygote (2n) is formed, which will develop forming the adult individual. Meiosis in this cycle is known as final or gametic meiosis.

h) Capsule - 2N: It is in the capsule that the transition from the mother cell (2N) to the spore cell (N) occurs. The capsule is protected by calyptra (2N)

i) Seta - 2N: Setae are primarily part of the sporophyte, but can appear in some specific gametophyte phases (in parasitism). They support the capsule and assist in nutrient uptake.

The protein hormone insulin is produced and secreted by beta cells in the pancreas. Rough endoplasmic reticulum and Golgi apparatus are the organelles that contain a significant amount of this material. Option (c).

The pancreatic islets of Langerhans' -cells produce insulin in response to an increase in intracellular Ca2+ concentration ([Ca2+]i). This is brought on by an external Ca2+ influx through voltage-dependent Ca2+ channels, whose activity is in turn controlled by the membrane potential of the -cell.

In order to keep blood glucose levels within a specific physiological range, the pancreatic beta cells produce, store, and release insulin, the anti-hyperglycemic hormone that competes with glucagon, growth hormone, glucocorticoids, adrenaline, and other hyperglycemic hormones.

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Correct Question :

Beta cells in the pancreas produce and secrete the protein hormone insulin. In which organelles in these cells can a relatively large amount be seen?

A. Smooth endoplasmic reticulum and lysosomes

B. Cytoskeleton and peroxisomes

C. Rough endoplasmic reticulum and Golgi apparatus

D. Flagella and cilia

Answer:

The ecologist provide information about the ecosystem.

Explanation:

The ecologist is a person who provide information about the relationship between organism and its environment. The ecologist tell the people about the benefits of plants that exist in our environment. Biomass is widely used as source of energy in a community which is gained from cutting of trees. The removal of trees causes damage to the whole ecosystem so the people of community used less biomass or other materials as a source of energy.

Answer:

orensically valuable DNA can be found on evidence that is decades old. However, several factors can affect the DNA left at a crime scene, including environmental factors (e.g., heat, sunlight, moisture, bacteria, and mold). Therefore, not all DNA evidence will result in a usable DNA profile.

Explanation:

Answer:

O A. Carnivorous plants get their energy from eating bugs.false

B. Carnivorous plants do not get nutrients from the soil. false

O C Carnivorous plants get their energy from the sun.

o true

D. Carnivorous plants get their nutrients from eating bugs.true

Explanation:

In food web, the relationship between Texas horned lizards and other lizards would be described as competitive, as they are both predators and compete for similar prey. The term "mutualistic" would not accurately describe their relationship in this scenario.

A food web comprises of all the well established pecking orders in a solitary biological system. In an ecosystem, every living thing is connected to multiple food chains. Every pecking order is one potential way that energy and supplements might take as they travel through the biological system.

A food web is the mix of all the pecking orders in a biological system. We might observe something like a mouse eating a plant and then being eaten by an owl in a typical food chain.

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Answer:

CH₄ is the excess reagent and SO₄²⁻ is the limiting reagent.

0.040 g

Explanation:

Step 1: Write the balanced reaction for the methane anaerobic oxidation

CH₄ + SO₄²⁻ ⇒ S²⁻ + CO₂ + 2 H₂O

Step 2: Establish the theoretical mass ratio between the reactants

According to the balanced equation, the theoretical mass ratio of CH₄ to SO₄²⁻ is 16.04:96.06 = 0.1670:1

Step 3: Establish the experimental mass ratio between the reactants

50 mg (0.050 g) of CH₄ react with 60 mg (0.060 g) of SO₄²⁻. The experimental mass ratio of CH₄ to SO₄²⁻ is 0.050:0.060 = 0.83:1

Comparing both mass ratios, we can deduce that CH₄ is the excess reagent and SO₄²⁻ is the limiting reagent.

Step 4: Calculate the mass excess of CH₄

The mass of CH₄ that reacts with 0.060 g of SO₄²⁻ is:

0.060 g SO₄²⁻ 16.04 g CH₄/96.06 g SO₄²⁻ = 0.010 g CH₄

The mass excess of CH₄ is:

0.050 g - 0.010 g = 0.040 g

Natural selection theory is not goal-oriented.It is predicted that white and brown mice are descended from a multicolored ancestor population.

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Heredity diseases may be the result of a mutation of a gene or a chromosomal abnormality.

Hereditary diseases are conditions that run in families and are caused by changes in a person's DNA or genes that are passed down from one generation to the next. These disorders, which can affect the brain, heart, blood vessels, and other organs, can be inherited in a dominant or recessive fashion.

Cystic fibrosis, sickle cell anemia, Huntington's disease, and many other conditions are examples of genetic diseases. The symptoms and severity of inherited disorders can vary widely, and some may not appear until later in life.

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Answer:

transporting oxygen and nutrients to the lungs and tissues.

forming blood clots to prevent excess blood loss.

Explanation:

Nutrient cycles includes the water cycle, carbon cycle, nitrogen cycle, and oxygen cycle. It is the cycle where the transfer of energy is taking place between living organisms and non-living parts of the environment. It is essential for the development and growth of organisms present in a certain environment. Because it is considered as a cycle, the consumption of nutrients by the living organisms will be released back to the environment by way of death or decomposition.

Answer - Option 1 - development and growth



Answer:

taste bud is the one that stimulate appetite and enable us to taste

Explanation:

because without the taste bud, we won't know that a particular food contain ions, acids and base

Answer:

to ensure that the two individuals are of the same species

Explanation:

It also involves stereotyped behaviours. Courtship behaviour informs a potential mate that the intention is breeding and not aggression.

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Answer:

Courtship can be defined as the behavior used to obtain copulation with a partner, or to maintain reproductive interactions with an existing partner.Courtship, in animals, behaviour that results in mating and eventual reproduction. Courtship may be rather simple, involving a small number of chemical, visual, or auditory stimuli; or it may be a highly complex series of acts by two or more individuals, using several modes of communication.It help strengthen a pair bond that may last through the raising of the young or even longer.Courtship is its use as an isolating mechanism, a method of keeping different species from interbreeding.

Answer:

A

Explanation:

Homeostasis' main job is to keep your body balanced, typically with variable factors such as temperature or enzyme amounts. Your heart rate increases to keep your blood pressure steady while you exercise. This way, you can have a relatively balanced blood pressure as you exhilarate yourself.

Answer:

Burning fossil fuels, releasing chemicals into the atmosphere, reducing the amount of forest cover, and the rapid expansion of farming, development, and industrial activities are releasing carbon dioxide into the atmosphere and changing the balance of the climate system.

What are the top 3 human activities that produce CO2?

Eighty-five percent of all human-produced carbon dioxide emissions come from the burning of fossil fuels like coal, natural gas and oil, including gasoline. The remainder results from the clearing of forests and other land use, as well as some industrial processes such as cement manufacturing.

What causes carbon dioxide to increase in the atmosphere?

Human Activity Is the Cause of Increased Greenhouse Gas Concentrations. Over the last century, burning of fossil fuels like coal and oil has increased the concentration of atmospheric carbon dioxide (CO2). This increase happens because the coal or oil burning process combines carbon with oxygen in the air to make CO2.

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Chemical signals known as pheromones have developed to facilitate communication among individuals of the same species.

A pheromone signal causes the receiver to have a certain response, such as a stereotyped behavior (the releaser effect) or a developmental process (primer effect). Pheromones are primarily used by bees, wasps, ants, moths, and other insects to communicate. Chemicals known as pheromones can be released in dung, urine, or by specific glands. They are often released by the species' female to draw in males.In animals, pheromones have a role in bonding between mothers and their newborns, social interactions, eating, and reproduction. Pheromones function within a species by definition and in accordance with evolutionary theory.

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Some of the threatened mammals of the Valdivian forests include the monito del monte (Dromiciops gliroides), an arboreal marsupial, the southern pudú (Pudu pudu) the world's smallest deer, and the kodkod (Leopardus guigna), South America's smallest cat. Since the beginning of the 20th century, there have also been nonnative wild boars living in the Valdivian forests.[citation needed] Hummingbirds are common on Valdivian forests because of the presence of plants like the maqui (Aristotelia chilensis) and the copihue.

Most mammal genera in Valdivian temperate rain forest are also found in semi-arid parts of Patagonia.[8] Relative to similar forest in North America there is a low diversity

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