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Final answer:

Vacuoles are membranous sacs present in eukaryotic cells and are involved in storage and transport. They are distinct from ribosomes, which are not membrane-bound and are involved in protein synthesis. Vacuoles are prominent in plant cells but are also found in animal cells, albeit smaller and less permanent.

Explanation:

Vacuoles are membranous sacs essential for the storage and transport of substances within eukaryotic cells. They are enclosed by a single membrane and vary in function from one cell type to another. In plant cells, vacuoles play several roles, including maintaining turgor pressure, storage of nutrients, and waste products, and can contain enzymes that break down macromolecules. In contrast to vesicles, vacuole membranes do not fuse with other cellular membranes. Although vacuoles are present in some animal cells, they are more prevalent and larger in plant cells, often consolidating into a single large central vacuole as the plant cell matures.

Ribosomes, another cellular component often mistaken with vacuoles, are the sites of protein synthesis. However, unlike vacuoles, ribosomes are not membrane-bound and are composed of ribosomal proteins and RNA. They can be found attached to the endoplasmic reticulum or floating freely within the cytoplasm. It's clear that vacuoles are not manufactured by ribosomes, nor are they composed of microtubules. They have specialized functions that are crucial for the cell's viability and operation.

Final answer:

A febrile seizure in a 3-year-old with fever can occur due to a rapid increase in body temperature, often as a result of an infection such as the flu or an ear infection. Most febrile seizures are short and not indicative of long-term problems, but they can sometimes signal an underlying condition like epilepsy.

Explanation:

In a 3-year-old with fever, febrile seizures may precipitate due to the sudden spike in body temperature often associated with infection. Febrile seizures are most common in young children between the ages of 6 months and 5 years and can occur when a child's temperature rises quickly. Common infections that might lead to a fever and subsequently a febrile seizure include influenza, ear infections, or after immunizations. However, it's important to note that not all fevers in children will lead to seizures, and most febrile seizures are relatively short and don't typically lead to long-term health problems. Nonetheless, in some cases, seizures in young children may indicate an underlying condition, such as epilepsy, especially if they recur without a fever or are of a specific type or duration.

Answer: The correct answer is- d. competition.

Competition can be described as a biological interaction between individuals belonging to same ( intraspecific) or two or more different species ( interspecific) for territory, food, and other resources.

Dogs bark at unknown individuals, when they approach their house. By this behavior, they exhibit defense for their territory. This behavior is exhibited  because  dog is fearful and perceives strangers as a threat to their territory.  

Thus, option d) is the right answer.

Ans.

In vertebrates, genes responsible for the growth and development of limbs in developing embryos are known as Hox genes (homeotic-box genes). Along with limb development, these genes include a group of genes that control the head-tail axis and body plan of developing embryo.

A single mutation in a Hox genes can lead to formation of mutated Hox protein and turn off the growth of legs in an organism.

Thus, the correct answer is 'option B). a Hox gene.'

Answer:

Asexual reproduction is not widespread in animals as it is in plants.

Explanation:

Animals are mostly undergoing sexual reproduction to get diverse genetic combinations that is essential for survival. It is also necessary for the population to adapt to the changes in their surroundings.

If it was asexual mode of reproduction, then the offspring needs to depend on mutations  of the chromosomes to get the genetic diversity. But it is known that for mutation to happen it takes a long time or it does not happen often.

Hence, animals with asexaul mode are found to be at disadvantage that those with sexual mode of reproduction.

Asexual modes of reproduction is widespread in plants.

The correct method of mineral formation for calcite and aragonite minerals that constitute clam shells is biogenic precipitation.

Biogenic precipitation is a process where minerals are formed as a result of biological activity. In the case of clam shells, the organism (clam) extracts calcium and carbonate ions from the surrounding water to form the minerals calcite and aragonite, which are both calcium carbonate (CaCO3) but have different crystal structures. These minerals are then deposited in an organized manner to create the hard, protective shell of the clam. This biological process is a key example of biomineralization, where living organisms produce minerals that often have specific functions, such as providing structure and protection.

Answer:

Alfalfa

Explanation:

Answer:

C,throwing a test tube at another student

Explanation:

this is called LIQUEFACTION

The correct answer from these choices is liquefaction.

Final answer:

The brainstem is responsible for the regulation of numerous vital functions, including breathing, heart rate, and blood pressure, with the medulla, in particular, overseeing these processes.

Explanation:

The brainstem is the part of the brain that regulates breathing, heart rate, blood pressure, and reflexes. This hindbrain structure controls automated processes critical for life, connecting the brain with the spinal cord. Within the brainstem, the medulla specifically oversees vital unconscious functions such as breathing, blood pressure, and heart rate. The brainstem also includes other parts like the midbrain and the pons, which together support a range of automatic functions necessary for our survival.

Final answer:

A beta test in the design process is conducted during the testing and evaluation phase, after creating prototypes and before finalizing the design for implementation.

Explanation:

In the design process, a beta test is typically conducted during the testing and evaluation stages, after a prototype has been developed. Beta testing is part of the iterative process of refinement, where the prototype is evaluated to discover any weaknesses or potential improvements within the design. This may involve multiple iterations, with each one designed to enhance the previous version. If the beta test reveals significant issues, the design process may return to earlier stages, such as revisiting the design concept or making more prototypes. Only once the design has been sufficiently refined and meets all the criteria and constraints is it ready for implementation and, ultimately, manufacturing and selling. This iterative and spiral process is essential for creating a high-quality, reliable design ready for the market.

Answer: The person who has Alzheimer's disease shows excessive amount of amyloid plaques and tangled bundles of fibers.

Explanation:

The symptoms of the Alzheimer's disease shows many symptoms which includes memory loss, language problem and many other unpredictable behaviors.

The presence of tangles and plaques in the brain are reason of Alzheimer's. The loss of connection between the nerve cells shows many symptoms like abnormal behavior, loss of memory et cetera.

Answer:

Plant cell parts are cell wall, chloroplast.  Animal cell parts are centrosomes and lysosomes.

Explanation:

Animal and plant cells are eukaryotic cells but still shows many structural differences.

Plant cells contain chloroplast because they perform the process of photosynthesis. Animal cells lack chloroplast. Cell wall is present in plant cells and absent in animal cells.

Animal cells have centrosomes that helps in the formation of spindle fibers,. Lysosomes perform the process of cellular digestion in animals.

Thus, plant cells have cell wall and chloroplast whereas animal cells have lysosomes and centrosomes.

Cell parts which are found only in plants cells include the

following:

Cell parts which are found only in animals cells include the

following:

These are regarded as cell parts which are involved in various

activities in the cell.

Plant and animals have different cell parts as listed above due

to different biochemical activities which takes place within them

Read more about Organelles here https://brainly.com/question/14029612

As cross-sectional area of a Muscle is proportional to __L2_____ and l is proportional to __M1/3_____, we have that strength is proportional to __M2/3.___.

Isometric scaling is the preservation of proportional relationships even as size of organisms changes through growth

Since it is assumed that all the organisms scale isometrically and also Given that L denotes the length and m denotes body mass of an individual the cross-sectional area of a muscle is proportional to L2 while I is proportional to M1/3 and the strength will be proportional to M2/3.

Hence we can conclude that As cross-sectional area of a Muscle is proportional to __L2_____ and l is proportional to __M1/3_____, we have that strength is proportional to __M2/3.___.

Learn more about isometric scaling : https://brainly.com/question/4057530

Answer:

B. A secondary consumer that obtains its energy from the consumption of animals.

Explanation:

The red-tailed hawk is a secondary consumer because it feeds itself on primary consumers those that eat plants, herbivores. Secondary consumers, by definition, obtain their energy from eating other animals. Secondary consumers are also usually the ones that stand on the second and above rows of a food chain, being the plants at the bottom and the primary consumers just above the plants.

Answer:

Inter phase is the resting phase between two cell cycles

Explanation:

The inter phase is the longest phase in the life cycle of a cell and is also known as resting phase of the cell in which the cell performs the following activities -

a) Cell acquire nutrients

b) Cell creates proteins and other molecules and uses them

c) Cell also starts replicating DNA molecule

c) Cell starts preparing for the process of cells division

There are three stages in a cell cycle -

a) Gap 1 phase

b) Synthesis phase

c) Gap 2 phase

The major function of inter phase is to prepare cell for cell division.

Answer:

The Correct Answer is "Reforestation".

Explanation: