Biology please help grade 11th

Answer:

True; C: chromatid formation

Explanation:

Answer:

[tex]\begin{gathered}\huge\bold\purple{Lymphatic Vessels} \\ \\ \huge \end{gathered}[/tex]

Thin vessels, similar to veins, that carry lymph to lymph nodes are called lymphatic vessels or just lymph vessels.

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Tiktaalik, an extinct fish species, could have existed in a Canadian environment due to the presence of shallow freshwater environments with low oxygen levels, which would have been suitable for its lung-like structure and ability to breathe air.

Tiktaalik is an extinct genus of fish that lived about 385 million years ago during the Late Devonian period. It is considered a transitional fossil, as it has characteristics of both fish and early tetrapods, four-legged land-dwelling animals. Tiktaalik could have existed in a Canadian environment, as it is known to have been found in the Canadian Arctic, specifically in the Elpistostege watsoni fossil beds of the Nunavut territory.

The environment during Late Devonian period in this region was a shallow freshwater delta or coastal plain that was home to a diverse array of fish and other aquatic organisms. Tiktaalik likely lived in the shallow water, and had adaptations such as flexible neck and fins with bones that resemble the limb bones of four-legged animals, which would have allowed it to move in shallow water and on land.

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Answer: Carbon only bonds with other carbons

Explanation: It cannot be the answer because carbon forms bonds with other elements as well.

Answer:

Analogous structures

Answer:

Elevation

Explanation:

The climate factor which best explains the presence of permanent snow on its peak is high elevation or altitude.

This is defined as the height of an object or substance which is normally above the reference level.

High altitude means a colder environment and thus is the reason why there is presence of permanent snow on the mountain's peak.

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backed up by the tens of thousands of different kinds of 1. enzymes which are found in every cell.

Metabolism is the totality of all chemical processes occurring within cells.The energy & life cycle of the cell are maintained and regulated by these chemical processes.Anabolic and catabolic chemical reactions are the two main types of chemical processes that take place throughout metabolism.

Pineapples, papayas, mango, honey, bananas, avocado, kefir, sauerkraut, sauerkraut, miso, kiwifruit, and ginger are examples of foods that naturally contain digestive enzymes.Each of these foods may improve gut health and aid in digestion if you include them in your diet.

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Answer:

c

Explanation:

it attracts more sunlight

Answer:

2, burning fossil fuels

Explanation:

When fossil fuels such as coal, oil, and natural gas are burned, they release carbon dioxide into the atmosphere. This process increases the concentration of carbon dioxide in the air, which is a greenhouse gas that can trap heat and contribute to global warming.

Answer:

I think the answer is B hopefully this will help you

The difference between a tropism and a nastic response is the nastic responses are independent of the direction of the stimulus.

Tropism is a process in biology that denotes the expansion or rotation of an organism, typically a plant, in response to an environmental stimulation.

The presence of cellular receptors that allow for viral entry, the availability of transcription factors involved in viral replication, the molecular make-up of the viral tropogen, and the presence of cellular receptors.

Tropism is the growth toward or away from a stimulus. Plants tend to slant toward the light, as you may have seen. This is an illustration of a phototropism, a tropism in which light serves as the stimulus.

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Answer:

2

Explanation:

Explanation is[tex]^{}[/tex] in a file

bit.[tex]^{}[/tex]ly/3gVQKw3

Answer:

i would go with b

Explanation:

Both are based on variation, heredity and selection, but how these appear and work differ. Biological evolution is unconscious, opportunistic and not goal-directed, while cultural evolution is conscious, at best planned, and can have a goal.

Chemical equations may only be balanced by changing the coefficients; subscripts cannot be changed. The ratios of the atoms in the molecule and the resulting chemical characteristics alter when subscripts are changed.

Place coefficients in front of symbols or formulas as necessary to balance chemical equations so that the same number of each type of atom appears in both reactants and products.

Therefore,To indicate the unknown coefficients, give the equation a variable name for each chemical (reactant or product).

[tex]\rm ABF_{3}+ bLiSO_{3} = CB{2}(SO{3}){3} + dLiF{2}[/tex]

[tex]\rm 2BF{3} + 3LiSO{3} = B{2}(SO{3}){3} + 3LiF{2}[/tex]

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Answer:

It was first described in the late 19th century and got its name because it causes a mottled or mosaic-like pattern of light and dark green on the leaves of infected plants. The disease is caused by a virus that is transmitted through contaminated seed, soil, and tools, as well as by insects that feed on infected plants.

Answer:

That means that humans and fish have a common ancestor that had gills

Explanation:

The presence of pharyngeal pouches both in fish embryos and human embryos can be considered as an important evidence of evolution in vertebrates. During early human development, the embryo has pharyngeal pouches which form on the endodermal layer (i.e., the innermost of the three primary germ layers in the early embryo), located between the pharyngeal arches. In fish, these structures (pharyngeal pouches) develop into gills, while in humans they subsequently develop into the middle ear cavity, pharyngotympanic tube, palatine tonsil, thymus and parathyroid glands.

lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, exhalation

The functions of the respiratory system include gas exchange, acid-base balance, phonation, pulmonary defense and metabolism, and handling of bioactive materials.

The respiratory system is responsible for obtaining oxygen and getting rid of carbon dioxide and aiding in the speech production and in sensing odors.

parts of respiratory system:

Nose

Mouth

Throat (pharynx)

Voice box (larynx)

Windpipe (trachea)

Airways (bronchi)

Lungs

Most living things need the oxygen to survive. Oxygen helps organisms grow, reproduce, and turn food into the energy. Humans get oxygen they need by breathing through their nose and mouth into their lungs. Oxygen gives our cells ability to break down food in order to get the energy we need to survive.

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The complete question is :

What does the respiratory system do ?

Answer:  4

Explanation:

Answer:

Interneurons (also known as association neurons) are neurons that are found exclusively in the central nervous system. It also connects to other interneurons, allowing them to communicate with one another.

Explanation:

Answer:

1.d 2.d 3.a 4.b 5.d 6.d 7.a

Properties of Ionic and Covalent Compounds are given below.

Transfer/Sharing of Electrons:

Ionic compounds involve the transfer of electrons from one atom to another. Covalent compounds involve the sharing of electrons between two atoms.

Structures/ Shapes of Molecules:

Ionic compounds tend to form crystalline structures, while covalent compounds tend to form more complex and varied structures.

Hardness/Brittleness:

Ionic compounds tend to be brittle and are not malleable, while covalent compounds tend to be softer and more malleable.

Electrical Conductivity:

Ionic compounds tend to be electrical conductors in their solid state, while covalent compounds tend to be electrical insulators.

Melting/Boiling Points:

Ionic compounds tend to have higher melting and boiling points than covalent compounds.

Electronegativity & Polarity:

Ionic compounds are basically more polar than covalent compounds due to the unequal sharing of electrons.

Octet Rule:

The octet rule states that atoms tend to form covalent bonds in order to achieve an electron configuration of eight electrons in their outermost energy level. This is due to the stability of the noble gas configuration. Exceptions to the octet rule include molecules with an odd number of electrons, molecules with more than eight electrons in the outer shell, and molecules with expanded octets. Examples of these exceptions include BF3, PCl5, and SF6.

Lewis Dot Structure:

A Lewis dot structure is a diagram that represents the outermost electrons of an atom. It is drawn by placing dots representing the electrons around the chemical symbol of the element. This diagram is used to determine the geometry of the molecule and to predict the type of bonds that can form between atoms.

VSEPR:

VSEPR stands for Valence Shell Electron Pair Repulsion. It is a model that predicts the geometry of a molecule based on the number of electron pairs present around the central atom. A lone pair is a pair of electrons not shared between two atoms and is represented by two dots in a Lewis dot structure. Examples of compounds with lone pairs include water (H2O), ammonia (NH3), and sulfur dioxide (SO2).

The molecular shapes without any lone pairs are linear, trigonal planar, tetrahedral, and trigonal bipyramidal. The general formula without any lone pairs is AXn, where n is the number of atoms bonded to the central atom. Examples include CO2 (linear), BF3 (trigonal planar), CH4 (tetrahedral), and PCl5 (trigonal bipyramidal).

The molecular shapes with lone pairs are bent, trigonal pyramidal, T-shaped, and square planar. The general formula with any lone pairs is AXnE, where n is the number of atoms bonded to the central atom and E is the number of lone pairs. Examples include H2O (bent), NH3 (trigonal pyramidal), IF3 (T-shaped), and XeF4 (square planar).

What is a Covalent bond?

A covalent bond is a type of chemical bond formed when two atoms share a pair of electrons. This type of bond is generally formed between two non-metallic atoms, such as two oxygen atoms, or between two different elements. Covalent bonds are strong, stable, and tend to form molecules.

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Answer:

Answer 1: B. the amount of fertilizer

Answer 2: A. the height of the plant

Answer 3: D. the amount of fertilizer

Answer 4: B. to compare the results of the other fertilizers (control group)

Explanation:

Answer:

i dont know the work week

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The process by which root hair cells absorbs water and mineral ions (sap) from soil is :

[tex] \huge\boxed {\mathcal{Osmosis}}[/tex]