Which of the following is correctly defined?

A. Ecosystem - A group of conspecific organisms.

B. Population - An individual life form.

C. Community - A group of populations.

D. Population - A group of communities.
I need help!!1

Answer:

Explanation:

Answer:

14. (a) Pb

15. (d) Al

16. (A) increases

Explanation:

14.

In the reactivity series of metals an element can displace another element from a compound if and only if it is not placed below that metal, as the reactivity of metals decreases when moving from top to bottom- if a metal is placed below Hydrogen it means that it is less reactive than Hydrogen and hence cannot displace Hydrogen from its compound.

All options except A are placed below Hydrogen in the reactivity series, so they wont displace Hydrogen from its compound, but option (a) that is Pb can do so as it is above Hydrogen in the reactivity series.

15.

Al is placed below Mg in the reactivity series and hence cannot displace Mg from its compound.

16.

The reactivity of metals increases down the GROUP.

[CAUTION :- We were talking 'bout REACTIVITY SERIES in the top 2 questions where reactivity decreases down the group, but we're talkin' 'bout GROUPS of the periodic table here, where reactivity increases down the group.]

The size of metals increases down the group causing their valence electrons to drift far from the nucleus so that they can be lost easily. The metals have a property of losing electrons so the more electrons it can lose more will be its reactivity.

Hence, reactivity increases down the group.

Answer:

Carrying capacity

Explanation:

Carrying capacity means the number of organisms that a region can support without environmental degradation.

Water is a source that is used for various purposes. The industry overuses the surface water, whereas agriculture overuses the groundwater leading to water scarcity. Thus, option C is correct.

Water scarcity is the unavailability of water or can be said as a shortage of water through the regular supplies due to the overuse and excess waste of these resources.

The lack of sufficient amount of water that has been said to be not equal to the demand is a major issue that affects every organism globally. It can lead to economic decline as there will be drought.

Water is used in various fields including the industries for machines and other works, and also in agriculture fields to grow plants and crops. The industry uses the water present on the surfaces like lakes, and rivers, while crops need the water from the wells.

Therefore, option C. the industry and agriculture overuse water.

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Answer:

Ball A has more density.  

Explanation:

Density is found using mass divided by volume. Let's say ball A has a mass of 6 grams, and ball B has a mass of 3 grams. If the volume for both is 1 mL, then ball A has more density.

Answer:

C.

Explanation:

Anaerobic respiration is a process of cellular respiration. In this type of cellular process of respiration, oxygen is not needed to break down complex food substances such as glucose. Energy is generated in the process which is used for other cell functions.

Therefore, the answer is C.

Answer:

yes

Explanation:

Because science &biology have a connection

Answer:

homeostasis

Explanation:

Homeostasis has to do with processes that maintain the internal balance within an organism. It can succinctly be defined as the process of regulating an organism's internal environment. The process of homeostasis is very important in the maintenance of important indicators of balance in the body such as body temperature, body pH, etc.

Hence, when blood pH becomes overly acidic, respiration and kidney function change to bring the acidity back to its normal pH level of 7.4. This is a homeostatic response.

Answer:

3) homeostasis

Explanation:

is the process where by some oranism keep their internal conditions suitable for living

Answer:

Olfactory sensory neurons (OSN).

Explanation:

Olfactory sensory neurons (OSN) are the sensory neurons that is responsible for vision. Photoreceptors and olfactory sensory neurons (OSN) are the two types of sensory neurons for vision. Both olfactory sensory neurons (OSN) and photoreceptors is responsible for the receiving of photons and enable us to see things. The right half of the visual field will travel in the left optic tract, while on the other hand, the stimuli from the left half of the visual field will pass through the right optic tract.

Answer: The two types of sensory neurones are the CONES and RODS. Their functions are better outlined below

Explanation:

The CONES and RODS are the sensory neurones ( photoreceptors) of the eye which are located in the retina.

The RODS: They are extremely sensitive and can detect light of very low intensity. They also perceive light in black and white. They, therefore, play an important role in dim light.

The CONES: They function in bright light and are responsible for colour vision.

The path visual input take AFTER reaching the sensory neurons is as follows:

--> the rods and cones are stimulated

--> A pattern of electrical impulses is sent to the brain through the optic nerve which interprets it, drawing on past experience.

The brain tells us that the object is upright and gives us it's real size and distance from the eye. We, therefore, see the object as it actually is, and not as the image formed on the retina.

Answer:

cells are the basic building blocks of all organisms , whether living or dead.

atoms are the basic building blocks of matter(non-living things) . every item , for eg, chair, book, toothbrush are made of atoms?

Explanation:

Lay a square napkin down on a clean work surface so that it's open all the way. Iron if needed.

STEP 2: FOLD IN DIAGONAL HALF

Grab a hold of the right hand corner nearest you and fold it over to meet the opposite upper left corner. Straighten out the edges so that they all meet up.

STEP 3: TURN IT

Turn the triangle so that the longest side is parallel to you and the table's edge.

STEP 4: FOLD IN

Fold the left corner in so that it sits JUST past the midway point of the long side of the triangle, like pictured.

STEP 5: FOLD IN AGAIN

Now repeat for the right hand corner.

STEP 6: FOLD OVER

Take the lower left corner and bring it in to the bottom midpoint of the now 'house' shaped napkin. Press the new left side fold down.

STEP 7: FOLD OVER AGAIN

Repeat on the right side.

STEP 8: FOLD UP

Take both bottom corners and bring them up to rest just below the top right corners. Press down the new folds.

STEP 9: CLOSE THE ENVELOPE

Take the top point of the envelope 'flap' and bring it down (or close it) to complete the envelope.

STEP 10: ADD A PERSONALIZED CARD

Use your envelope napkins to include a personalized 'letter' or card to each guest's plate. Some ideas for what this could be are:

holiday greeting card

menu

place card

family photos from past celebrations

holiday story or poem

coloring cards with pencil crayons for kids

game cards: trivia, scavenger hunt, etc

Answer:

a. Lochotrophozora

Explanation:

Molecular research and studies complement morphological research and improve our awareness and knowledge of evolutionary history. Previously, morphological studies could only reveal to us the variations and distinctions, but molecular studies and phylogeny have enabled us to pinpoint the fundamental mechanism of this variation on a genetic level, as well as locate it down to evolutionary lineage, which has led to more enhanced genealogy and evolutionary studies.

However, the group of organisms that best reflects and represents this kind of change is: Lochotrophozora

Groups represent an example of this change is option "A" which is Lochotrophozora.

Lophotrochozoa is a monophyletic group of animals that includes annelids, molluscs, bryozoans, brachiopods, Platyhelminthes, and other animals that descended from the common progenitor of these organisms.

Lophotrochozoa is one of the three major clades that include bilateral animals, or Bilateria.

Thus, option "A" is Lochotrophozora.

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Answer:

a. midbrain

b. thalamus; hypothalamus, epithalamus

c. cerebral aqueduct

d. medulla oblongata

e. choroid plexus

f. pons; medulla oblongata; midbrain

g. hypothalamus

h. cerebrum

i. epithalamus

j. cerebrum

k. cerebellum

Explanation:

The brainstem is the posterior part of the brain that connects the cerebrum with the spinal cord. The brainstem can be divided into three parts: midbrain (i.e., mesencephalon), the pons (i.e., metencephalon), and the medulla oblongata (i.e., myelencephalon). The mesencephalon is a region of the brain composed of the tectum and tegmentum, which play fundamental roles in motor movement, auditory and visual processing. The corpora quadrigemina is found at the tectum region of the midbrain. The diencephalon is a small part of the brain located above the brainstem (between cerebral hemispheres); which contains the thalamus, hypothalamus, subthalamus, and epithalamus. In turn, the epithalamus is composed of the habenular nuclei, pineal gland, and the stria medullaris thalami. The cerebral aqueduct is a narrow channel (approx. 15 mm) in which the cerebrospinal fluid flows between the third ventricle and the fourth ventricle. The medulla oblongata is a long stem-like structure located in the brainstem of the brain, just in the place where the brainstem connects the brain to the spinal cord. The choroid plexus is a complex network of capillaries located at the cerebral ventricles of the brain, which serve to produce cerebrospinal fluid through ependymal cells that line the ventricles of the brain. The cerebellum is a major structure of the hindbrain and consists of the cerebellar cortex and a core of white matter having the cerebellar nuclei.

Answer:

The virus will transfer the DNA encoding cholera toxin to the next bacteria it infects, which will make that bacteria cholera-causing.

Explanation:

The process described in this question is a kind of gene transfer in bacteria called TRANSDUCTION. Transduction is the transfer of fragments of DNA from one bacterium to another via a virus called bacteriophage.

As stated in this question, the virus (bacteriophage) infects a cholera-causing bacterium. The bacteriophage moves from lysogenic cycle to lytic cycle and includes some pieces of the bacterial DNA, which encodes information for making the cholera toxin, in its own genome.

This means that the cholera-making toxin DNA is now a part of the virus's genome and hence, will transfer it to the next bacteria it infects in a process called TRANSDUCTION. This will make that bacteria a cholera causing bacteria.

Answer:

No

Why not:

The midpoint of range is 3000. Yes, in from 1950-1955 there was a massive increase of the population of chipmunks but from then on it slowly decreased until 1990. In 1995, the population doubled from 1990. If you double 1440, you will get 2880. The biologist said between 2900-3100, using the midpoint of this range (3000) it is too low therefore being a bit unreasonable.

Hoped it is correct and helped you!

Answer:

d. rehabilitation

Explanation:

Technology-associated rehabilitation is an ecological practice that allows a degraded area to be restored, rehabilitating all its degraded habitats. However, this restoration is not done naturally, but is caused by human intervention, which can cultivate the entire plant population in the area, even adding non-native species, which are selected to leave the productive area, but ecologically harmonious.

Answer: salty and sour

Explanation:

Taste buds consist of the taste receptor cells and they're the nerve endings on the tongue that provide the sense of taste.

Based on the information given, the tastes that activate these receptors are salty and sour. The tastes depolarize the cell receptor directly.

Explanation:

I think this is the answer i try to do it

Answer:

A. type of fuel

Explanation:

The scientists combusted different types of hydrocarbons (different type of fuel)

Which best explains why, under the same circumstances, sawdust burns more fast than a wood block of equivalent mass The molecules in the sawdust move more swiftly than those in the

A thermal burn is what?

An injury to the skin or other organic tissue known as a burn is one that is primarily brought on by heat, radiation, radioactivity, electricity, friction, or contact with chemicals. When hot liquids, heated solids, or flames come in touch with the skin and other tissues, part or all of the skin's cells are destroyed (flame burns)

What various sorts of Burns are there?

This tiny burn merely penetrates the skin's surface layer (epidermis). It might hurt and make you red. second-degree burn Both the epithelium and the next layer of skin are affected by this kind of burn (dermis). It could result in skin that is swollen, red, white, or patchy. The pain may become intense and blisters may form. Scarring may result from second-degree burns that are deep.

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Answer:

C.More molecules in the sawdust can collide with oxygen molecules.

Explanation:

real

Answer:

The Big Bang theory is the prevailing cosmological model explaining the existence of the observable universe from the earliest known periods through its subsequent large-scale evolution. The model describes how the universe expanded from an initial state of high density and temperature,and offers a comprehensive explanation for a broad range of observed phenomena, including the abundance of light elements, the cosmic microwave background (CMB) radiation, and large-scale structure.

Crucially, the theory is compatible with Hubble–Lemaître law—the observation that the farther away a galaxy is, the faster it is moving away from Earth. Extrapolating this cosmic expansion backwards in time using the known laws of physics, the theory describes an increasingly concentrated cosmos preceded by a singularity in which space and time lose meaning (typically named "the Big Bang singularity"). Detailed measurements of the expansion rate of the universe place the Big Bang singularity at around 13.8 billion years ago, which is thus considered the age of the universe.

After its initial expansion, an event that is by itself often called "the Big Bang", the universe cooled sufficiently to allow the formation of subatomic particles, and later atoms. Giant clouds of these primordial elements—mostly hydrogen, with some helium and lithium—later coalesced through gravity, forming early stars and galaxies, the descendants of which are visible today. Besides these primordial building materials, astronomers observe the gravitational effects of an unknown dark matter surrounding galaxies. Most of the gravitational potential in the universe seems to be in this form, and the Big Bang theory and various observations indicate that this excess gravitational potential is not created by baryonic matter, such as normal atoms. Measurements of the redshifts of supernovae indicate that the expansion of the universe is accelerating, an observation attributed to dark energy's existence.

Georges Lemaître first noted in 1927 that an expanding universe could be traced back in time to an originating single point, which he called the "primeval atom". Edwin Hubble confirmed through analysis of galactic redshifts in 1929 that galaxies are indeed drifting apart; this is important observational evidence for an expanding universe. For several decades, the scientific community was divided between supporters of the Big Bang and the rival steady-state model which both offered explanations for the observed expansion, but the steady-state model stipulated an eternal universe in contrast to the Big Bang's finite age. In 1964, the CMB was discovered, which convinced many cosmologists that the steady-state theory was falsified, since, unlike the steady-state theory, the hot Big Bang predicted a uniform background radiation throughout the universe caused by the high temperatures and densities in the distant past. A wide range of empirical evidence strongly favors the Big Bang, which is now essentially universally accepted.

Explanation:

Answer:

Explanation:

its a theory

Answer:

If your question is:  Which two structures would the scientist most likely see? Then:

A scientist is using a microscope to observe a type of bacteria. The scientist most likely see cell wall and vacuole.

Innate talents or gifts enhanced through study and practice are abilities. The correct option is D.

Innate talents are those talents that are present in the organism from birth, They are not learned or observed from outside. These abilities are only enhanced as we grow up. They are already present in the body.

They are the natural, talents that with we grow up. Innate talents are also called natural skills. They are genetically present in our bodies. Some people are born with natural potential and skills. But without hard work and practice, these skills would not work.

Abilities are the things that are used by the organism to perform activities. Every organism has some abilities.

Thus, the correct option is D. abilities.

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Answer:

The cardiac muscle is made up of branched muscle cells, which have 1 or 2 nuclei and which the contact area between the heart fibers gives rise to specialized regions at the level of the plasma membrane called intercalary discs. The intercalary discs unite the cardiac muscle cells with each other, which provides greater adhesion to the tissue and intervenes in the rapid communication between cells. This allows its simultaneous contraction and the production of the beat.

Explanation:

The intercalary discs are the union systems that associate the cardiac muscle cells to form the myocardial fibers, the cardiac muscle is the muscle tissue of mixed components, which is located exclusively in the walls of the heart. For this reason, it has the function of generating the necessary contractions for the blood to reach all parts of the body.The intercalary discs are a special type of intercellular junction, a gap that guarantees electrical communication between these cells; and on the other hand, it provides places of adhesion and anchorage of one cell with another. The intercalary discs provide the structural foundation that allows the heart to behave as a functional syncytium.

Answer:

Constant variables

Explanation:

Elaina's investigation lacked the critical ingredient of constant variables which are important components of every scientific investigation. In every research, there are 3 important variables, namely:

1. Dependent variables: the actual variable to be measured during the course of investigations and whose values are dependent on another variable (independent variable) supplied by the investigators.

2. Independent variable: one of the variables that are supplied by investigators whose values are often manipulated to see the kind of changes it will cause to the dependent variable.

3. Constant variables: other variables that are neither independent nor dependent but constant for all the various experimental groups in investigations.

Constant variable is the factor which is missing from the Elaina's scientific investigation.

Constant variable is a type of variable that does not change or remain constant in the experiment. Elaina has to keep the type of music same to all the individuals such as the rap music should be replaced by classical music. This variable should be maintained constant for all people who participated in the experiment, then we will obtain the right results from the experiment so we can conclude that constant variable is the missing factor.

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Answer:

at what location? the question isnt finished

Answer:

lol I dont know the answer