Why are the male testes located in the scrotum outside the body?

The inner plexiform layer (IPL) of the retina contains bipolar and amacrine cells, which RGCs synapse with to receive excitatory and inhibitory synaptic inputs, respectively.

Their central processes connect with ganglion cells, a particular type of neuron found close to the inner surface of the retina, on the vitreous surface of the retina.

And their central processes exit the globe via the optic disc to create the actual optic nerve. The optic nerve is distinctive due to a few characteristics.

The retina's output neurons are called retinal ganglion cells, or RGCs for short.

The optic nerve receives the retina's nerve signals after they have traveled through the back of the eye. These signals are delivered by the optic nerve to the brain, which perceives them as visual images.

Therefore, Axons of ganglion cells form the optic tract. These fibers' synapse in the eyes.

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Active transport occurs when a solute molecule moves across a membrane against a concentration gradient, this process doesn't include diffusion of solute through the lipid bilayer of a membrane.

It is the process that is required to pump molecules against the gradient, both electrical and concentration.

Therefore, we can conclude that the active transport is carried out against a concentration gradient or electrical potentials, consequently, consumes energy, it doesn't include diffusion of solute through the lipid bilayer of a membrane.

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Answer:

(D). DNA fragments containing repeats are labeled with radioactive probes.

Explanation:

DNA fingerprinting can be defined as a process, which involves identification of DNA characteristics of an organism as unique in all organisms as fingerprints.

There are total five steps in DNA fingerprinting, which include isolation of DNA from the cells, digestion of DNA with restriction enzymes, separation of DNA fragments in agarose gel, transfer of DNA fragments to a blotting paper, and labeling of DNA fragments with radioactive probes of specific sequence to see the results.

Thus, the correct answer is option (D) as represents that last step of DNA fingerprinting.

Any astronomical body that revolves around a larger body is known as Satellite.

A natural or an artificial body which revolve around the planet in order to collect essential information or for communication is called as Satellite.

It can be natural or artificial. The moon, planet or machine that orbits a planet or star are satellites.

Earth  can be called satellite as it orbits the sun, similarly the moon is a satellite as it orbits Earth.

Artificial or  man made satellites are designed usually to collect the essential data like climate reports, temperature, humidity, gaseous content and  for communication.

Man made satellites are designed in a certain way that with a less time it can collect more information compared to ground level instruments.

Hence, an astronomical body that revolves around a larger body is called as satellite.

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Answer: Lysosome

Explanation:

This is an double membrane organelle found in the cytoplasm of the eukaryotic cell which contains variety of digestive enzymes.

Lysosomes contain enzymes such as DNAses, proteases, RNAses, cellulase and other digestive enzymes which act on the specific biomolecules and degrade the.

The lumen of lysosomes is acidic in nature thus, the foreign substance which gets ingested in the cell is easily digested by the enzymes.

In the given question since, the engulfed bacteria is digested by the enzymes which could have been provided by the lysosomes there fore lysosomes is the correct answer.

Answer:

Both the parents must be the carrier of recessive genes along with dominant gene

Explanation:

Recessive genes are genes that are expressed only when two recessive alleles are inherited from the parents.

A dominant gene is expressed in two cases a) when two dominant alleles are inherited or b) when one dominant and one recessive allele are inherited.

since parents have normal fur color but they are producing white fur coloured deer  (Albinitic offsprings)  this means that both of the parents must be the carrier of recessive genes.

Let the allele for “normal fur colour” be expressed by C

Allele for “white fur color” be expressed by c.  

Both the parents have heterozygous dominant gene (which is carrier if recessive allele "c"), thus their genotype would be Cc

Let see the punnet square below -

C c

C CC Cc

c Cc cc

Out of the four offspring’s produced only  “cc” represents white fur deer.  

Answer:

23

Explanation:

For humans, the diploid chromosome number equation is 2n = 46 because humans have two sets of 23 chromosomes.

The flatworm has cerebral ganglia connected to nerve fibers in a ladder-like arrangement, making A correct answer.

The organism that has cerebral ganglia in its head connected to ladder-like arrangements of nerve fibers is the flatworm. Flatworms exhibit a level of neural complexity that includes the development of a central nervous system (CNS), composed of a pair of cerebral ganglia and two nerve cords, and a peripheral nervous system (PNS), which spreads out throughout the body. This structure forms the basic nervous system in flatworms, where the two interconnected parallel nerve cords run the length of the body, and the cerebral ganglia located in the head act as a rudimentary brain. The evolution of cephalization is significant as it indicates the concentration of nerve tissue at one end of the body, forming a distinct head region with centralized control, which is a key adaptation observed in the flatworms of the phylum Platyhelminthes.

Past Super power British Empire, Soviet union.

Present super power USA

Future Super power China, India.

Answer:

Nitrogen fixation is the name of the process in which the atmospheric dinitrogen is converted into a form which can be used by the plants for their growth. The nitrogen fixation is done by a soil bacteria called as rhizobia which lives in symbiotic association with the root nodules of the leguminous plants. The bacteria converts the atmospheric dinitrogen into ammonia and nitrates which are readily absorbed by the plants. In return the the bacteria obtains the carbohydrates from the plants as a source of food.

From the information given, conclusions can typically be made about weight gain, body fat percentage, and microbial composition in the gut. Changes in these areas can influence health outcomes and overall metabolic function.

Without the specific data table, it's challenging to make exact conclusions. But typically, from this type of research, we can infer conclusions about weight gain, body fat percentage, and microbial composition in the gut. For instance, one might conclude that changes in diet resulted in different amounts of weight gain and body fat. One might also deduce that certain diets led to a significant increase or decrease in the ratio of Firmicutes to Bacteriodetes in the gut microbiota. These changes can influence health outcomes, including disease risk and overall metabolic function.

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The given questions involve biology, with an emphasis on animal behavior and learning mechanisms such as ingrained actions, different types of learning, and the role of mirror neurons in observational learning.

The questions listed span a range of topics but seem to primarily engage with concepts in biology, specifically those related to animal behavior. When examining innate behavior, animals exhibit certain actions from birth without being taught, such as a human baby's grasping behavior, which is crucial for survival as it strengthens attachment and ensures care from parents.

Cognitive learning in animals can be intriguing, demonstrated by the crow vending machine, which showcases a bird's ability to use tools and solve problems, indicative of associative learning. Different learning types, such as trial and error and observational learning, provide insight into how animals adapt and survive. While trial and error involve actions based on different outcomes, observational learning occurs through mimicking others' behaviors, a process facilitated by mirror neurons that activate both when an animal performs an action and when it observes another doing so.

These nuances in animal behavior are critical for student understanding in an educational setting, often explored in high school biology curricula. Additionally, considering the effectiveness of a student's learning process itself can sometimes mirror the same evaluative patterns seen in animal behavior studies.

Answer:

Disc-shaped cloud of gas and dust

Explanation:

The planets were formed from the clouds of dust particles and gases that resembles a disc. These particles were left over particles after the formation of the Sun. These gases and dust particles were attracted to one another due to the strong gravitational force, forming larger particles that orbits around the sun in a an elliptical path. This eventually led to the formation of planets.

The planets that are located close to the sun are generally comprised of rocky materials as the wind from the stars removed the gases from the surface of these planets and accumulated of heavier materials took place due to the strong gravitational force of the stars.

Answer:

Through blood vessels

Explanation:

Bones are made up of osseous connective tissue. These osseous connective tissues are made up of sparse cells within the extracellular network, or matrix . This matrix is made up of protein and minerals. The bone cell named Osteoblasts provides tensile strength to the bone by releasing proteins into the matrix. Collagen is the protein part of this bone matrix while the remaining part of bone matrix is made up of minerals  which provide hardness and compressive strength. Bone cells are living cells and they receive nourishment through the blood. The food delivery and waste removal is done by the blood vessels which pierce into the hard compact surface of the bone.

This is the sorting of each description by the type of RNA it describes:

tRNA

mRNA

rRNA

tRNA (Transfer RNA): Transfer RNA (tRNA) is a small RNA molecule that plays a crucial role in translation, the process by which the genetic information encoded in mRNA is converted into a functional protein. tRNA molecules act as carriers, each specifically recognizing and binding to a particular amino acid.

mRNA (Messenger RNA): Messenger RNA (mRNA) is the intermediate molecule that carries the genetic information from DNA to ribosomes for translation. It serves as a template for protein synthesis, providing the ribosome with the instructions to assemble a specific amino acid sequence.

rRNA (Ribosomal RNA): Ribosomal RNA (rRNA) is a major component of ribosomes, the cellular structures that carry out protein synthesis. rRNA molecules provide the structural framework for ribosomes and play a critical role in the translation process.

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Complete question:

Sort each description by the type of RNA it describes. drag each item to the appropriate bin

tRNA

mRNA

rRNA

contains an anticodon

contains exons

is a component of ribosomes

specifies the amino acid sequence for a protein

is the most abundant form of RNA

has amino acids covalently attached

Nociceptors are the receptors that adapt most slowly, as they send signals to the brain in response to potential tissue damage and maintain their response to ensure awareness of the pain.

The receptors that adapt most slowly are the nociceptors. Nociceptors are sensory neurons that respond to potentially damaging stimuli by sending signals to the spinal cord and brain. They are slow to adjust to a stimulus and are responsible for the sensation of pain, which serves as a warning for tissue damage. Unlike other mechanoreceptors that rapidly adapt, such as Meissner's corpuscles or Pacinian corpuscles, nociceptors maintain their response to a stimulus, which is important for alerting the body to continuous damage. This property is advantageous for survival, as it ensures that we are conscious of pain for a sufficient period to take action against harmful stimuli.