PLZ HELP 13+points
A population of lizards lived in an ecosystem that was prone to flooding. After many generations, most of the lizards in the population had longer legs than their ancestors, which helped them flee from floods. Which statement best explains this change? *

A)The lizard genes spontaneously mutated to address the flooding threat.
B)Genetic variation among lizard limbs allowed for natural selection to occur.
C)The limbs were artificially selected because humans probably caused the flooding.

Answer:

C- Bacteria become more resistant to antibiotics that are used to treat bacterial infections.

Explanation:

Selective breeding involves humans breeding plants and animals by choosing which animal or plant males and females will sexually reproduce and have offspring together. This is usually done to achieve a particular favorable phenotypic trait in the new offspring.

Bacteria become more resistant to antibiotics that are used to treat bacterial infections doesn’t undergo any selective breeding process by humans which makes it the right answer.

Answer:

Option B) study information related to the Cenozoic era

Explanation:

The complete question is

Scientists discovered that the Eocene time period existed in Earths history around 34 MYA. What do they need to do to determine what time period Eocene belongs to on the geologic time scale?

A) learn what happened during Precambrian time

B) study information related to the Cenozoic era

C) view the timing of events in the Mesozoic era

D) research events that happened during the Paleozoic era

Solution -

The period of Eocene belong to the Cenozoic era. The Cenozoic era is divided into three periods-  

a) The Paleogene – Existed between 65.5 to 23.03 million years ago

b) The Neogene - Existed between 23.03 to 2.6 million years ago

c) The Quaternary – Started some 2.6 million years ago and is continuing till present

The Paleogene is subdivided into three epochs –  

A) The Paleocene – existed between 65.5 to 55.8 million years ago

B) The Eocene – existed between 55.8 to 33.9 million years ago and  

C) The Oligocene – existed between 33.9 to 23.03 million years ago

Hence, studying about Cenozoic era will give information about the Eocene epoch

Hence, option B is correct

Answer:

HEY FELLOW HOT DOG OR PUGSTIEN THE ANSWER IS B

Explanation:

HOPE THIS HELPS ...BURGER

Explanation:

Organism or species with strong adaptation, or probably good traits.

Organism that can survive during competition are usually the ones to recognized for natural selection to occur in species.

Answer: C (Seeds allow gametes to live longer without water.)

Explanation:

Final answer:

The evolution of seeds allowed plants to reproduce independently of water. Pollen and seed structures enable seed plants to disperse their gametes and protect the embryos, aiding their conquest of dry land.

Explanation:

The evolution of seeds allowed plants to reproduce independently of water; pollen allows them to disperse their gametes great distances.

The two innovative structures of pollen and seed allowed seed plants to break their dependence on water for reproduction and development of the embryo, and to conquer dry land. The pollen grains carry the male gametes of the plant. The small haploid (1n) cells are encased in a protective coat that prevents desiccation (drying out) and mechanical damage. Pollen can travel far from the sporophyte that bore it, spreading the plant's genes and avoiding competition with other plants. The seed offers the embryo protection, nourishment and a mechanism to maintain dormancy for tens or even thousands of years, allowing it to survive in a harsh environment and ensuring germination when growth conditions are optimal. Seeds allow plants to disperse the next generation through both space and time. With such evolutionary advantages, seed plants have become the most successful and familiar group of plants.

Evolution is the continuous and heritable change over successive generations. Evolution leads to change in certain traits of an organism, which is then inherited by the offspring.

The data required to determine whether evolution occurred in the groups is that the two new populations must be formed from an original population, have evolved, and the inability of the two new breeds formed to reproduce.

Speciation can be caused due to evolution, in which the accumulation of small alterations in the genetic sequences over a long period of time.

For example, the speciation occurred when 200 years ago, apple maggot laid off the eggs on hawthorns.

Now, in the recent trend, the hawthorns mate with hawthorns, and maggots mate with the maggots only. It represents the evolution of species unable to interbreed and originated from a common source.

Thus, data required to determine evolution is a mutation, changes, original population, and reproduction.

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Answer:

B) Salmon evolved before kangaroos

Hope this helps!

Please mark brainliest!

Answer:

The energy flow through living organisms starts with sunlight and photosynthesis, then travels through the food chain in bite sized chunks. Primary producers, primary consumers, secondary consumers, and decomposers are all part of the food chain. It's great to be an Omnivore.

Hope this helps!

Engergy from the sunlight is absorbed by pigments in leaves through photosynthesis, completed by autotrophs. Heterotrophs them consume the autotrophs and their once light energy. Eventually, the heterotrophs die and decomposers decompose their bodies that contain the once light energy and put it in the soil.

Answer:

yeaaaa

Explanation:

Answer: the first one is C & the other is B

Explanation:

Answer:

The skeleton provides a framework for

⇒ muscle and soft tissue attachment.

Name one organ protected by the ribcage.

⇒ Heart, lungs, liver

Blood is formed in the

⇒ red bone marrow.

⇒ Calcium is released and deposited in the bones and blood to maintain homeostasis.

⇒ calcium, phosphorus, minerals, fat is stored in the bones.

When muscles

⇒ contract, the bones attached to them move.

Explanation:

it's on edge

The skeletal system provides structure and support for the body, protects vital organs like the heart within the ribcage, and plays a role in blood cell production, mineral storage, and movement in conjunction with muscle contractions.

The skeletal system plays several vital roles in the human body, including providing support and shape, protecting important internal organs, aiding in movement by serving as points of attachment for muscles, producing blood cells, storing minerals, and helping to maintain homeostasis. For instance, the ribcage is a structure within the skeletal system that protects critical organs such as the heart. Blood cells are produced in the red bone marrow, and calcium is a key mineral that is released and deposited in bones to maintain homeostasis. Additionally, phosphorus is another mineral that is stored in bones. When muscles contract, they exert force on bones, which results in the movement of the body.

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Answer:

Jellyfish start off their life in the polyp stage. The stage we are used to seeing (e.g. the jellyfish looking stage) is called the medusa stage.

Explanation:

Look at this image and see how a jellyfish actually starts out as not free-swimming.

Yes, a Jellyfish is a free-swimming for its whole life.

jellyfish swim at a pace of around two centimeters each second. They can move faster, but this doesn't help them catch prey, which is usually why they use the "swimming" motion of waving tentacles.

Jellyfish are among the most energy-efficient swimmers despite their gelatinous bodies and lack of fins. They accomplish this by constructing a wall of water to push off with using their bells.

The jellyfish begins to die as soon as the receding tide deposits it on the beach. A jellyfish inhales by taking in oxygen from the seawater through its skin so when it is on dry land it can at this point not live.

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Answer:

The peritoneum is a membrane made up of two layers. One layer lines the cavity and the other layer lines the organs. The peritoneum helps support the organs in the abdominal cavity and also allows nerves, blood vessels, and lymph vessels to pass through to the organs.

Explanation:

The periosteum is a vital membrane that covers bone surfaces, facilitating bone growth, repair, and nourishment, as well as serving as an attachment point for tendons and ligaments.

The periosteum is a fibrous membrane that covers the outer surface of all bones, except at the joints of long bones, and serves several important functions in the body. It provides a channel for the blood vessels and nerves to nourish and innervate bones. Additionally, the periosteum plays a crucial role in bone growth, repair, and remodeling. It contains cells that develop into osteoblasts which are essential for creating new bone tissue during the repair process. Tendons and ligaments also attach to the periosteum, establishing a structural connection between muscles and bones. The periosteum's deep layers and its involvement with the endosteum contribute to the growth of bones and the maintenance of bone health.

Answer:

Have a balanced diet and exercise regularly.

Answer:

Have a balanced diet and exercise regularly.

Explanation:

Answer:6 km/h

Explanation:

Given

Velocity of Sailboat is [tex]v_1=23\ km/hr[/tex]

Velocity of ocean current is [tex]v_2=-17\ km/hr[/tex]

negative sign indicated it is opposite of Sailboat

Therefore, velocity of sailboat w.r.t ocean current is

[tex]\Rightarrow v_{12}=v_1-v_2[/tex]

[tex]\Rightarrow v_{12}=23-17[/tex]

[tex]\Rightarrow v_{12}=6\ km/h[/tex]

Answer:

1) Asexual

2) Budding

Explanation:

Answer:

1. reduction

2. oxidation

Explanation:

<3

Answer:

Yes and Yes

Explanation:

Tertiary consumers are considered to be the top of the food chain and typically do not have any natural predators.

Quaternary consumers are often top predators within the environment, and they eat the tertiary consumers.

Answer:

This fish species can hide more easily in the coral reef environment

and thus to avoid the attack of predators .

Explanation:

According to Darwin's theory, the organisms more adapted to their environments have more chances to survive and reproduce their genetic material across generations.

A compressed fish with elongated jaws and banded coloration is suited for coral reefs due to efficient feeding mechanics, camouflage, and maneuverability in tight spaces. These adaptations, among others, play a crucial role in maintaining the balance and health of diverse coral reef ecosystems.

A compressed fish with elongated jaws and banded coloration would be well suited for a coral reef environment for several reasons. The elongated jaws allow the fish to feed on a variety of prey found in coral reefs such as coral, the cryptofauna, and seaweed. The banded coloration provides camouflage among the intricate landscapes of the reef, helping the fish avoid predators and ambush prey. Additionally, a compressed body can enable the fish to maneuver through tight spaces within the coral structures.

Coral reefs are dynamic ecosystems with more than 4,000 fish species, which include predators, herbivores, and planktivores. These species all play a role in maintaining a balanced coral reef. Predators, for instance, control the population of other species, ensuring a healthy competition for resources. Herbivores, such as parrotfish, contribute to sand production through their grazing habits. It is this interdependence that illustrates why particular adaptations are beneficial for coral reef survival.

Answer:

MSY management allows for maximum productivity of a fish species.  D is the answer

Explanation:

All other opinions include "risk" and "failure" which is not an advantage. The other option only focus on target species and that like a "bias". So therefore the answer is D

I studied and took the test

Answer:

D

Explanation:

Ecological succession is the process of gradual change in the types of species which live in a community. This can include both primary and the secondary situations.

Ecological succession is the process of change in the species structure of an ecological community over a period of time. The time scale through which succession take place can ranges from the time period of certain decades or more or less.

Ecological succession is of two major types depending upon the type of ecosystem or environment in which it is taking place. Ecological succession may be primary and secondary type. Primary succession takes place in the ecosystem where no living organism ever existed and secondary succession is the succession where living organisms once existed.

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Final answer:

Ecological succession is the process where species composition of a community changes over time, involving primary or secondary succession. Primary succession occurs in uncolonized areas, while secondary succession happens in previously inhabited but disturbed areas.

Explanation:

Ecological succession is the gradual change in the types of species that live in a community. This process can occur as either primary succession or secondary succession. Primary succession refers to the change over time in the numbers and types of species that live in an area that was never before colonized by living things. Secondary succession, in contrast, is the change over time in the numbers and types of species in an area that was previously colonized by living things but has been disturbed, for example by a forest fire.

Succession leads to changes in community structure and the types of ecosystems present as different species succeed one another over time. This process can significantly alter the biodiversity and physical landscape of an area.

Answer:

c: Heart disease <3

Explanation:

Edge 2021

Nailah has risk factors for heart disease. a healthy lifestyle that includes regular exercise, a balanced diet, and avoiding harmful habits such as smoking can help reduce the risk of developing heart disease.

Heart disease is a condition where the heart becomes damaged or weakened, leading to reduced blood flow to the body's vital organs. Several factors contribute to the development of heart disease, including high blood pressure, high cholesterol levels, and a diet high in sodium and saturated fats.

Processed and high-sodium foods are often associated with increased blood pressure, which is a risk factor for heart disease. Similarly, a diet high in cholesterol can cause plaque to build up in the arteries, leading to atherosclerosis, which is also a risk factor for heart disease.

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Answer:

Answer B is Correct

Explanation:

The atoms that is most likely to share electrons with other atoms is : ( B )

Covalent bonding is the sharing of electrons between two atoms

Atoms that are likely to share electrons form covalent compounds and covalent compounds have certain unique characteristics which are ;

The number of ions in the outermost shell/circle of an atom determines the ability of an atom to either share or transfer its ions to another atom. The purple circle having 7 small green spheres will share its electrons with other atoms to achieve the octet state.

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Answer:

RNA's will "read" certain chemicals in a DNA strand to code a protein.

there are different RNAs, like tRNA, and mRNA, each with a different job

hope this helps

Explanation:

Answer:

The Keeling Curve shows that atmospheric carbon dioxide levels are increasing, and at a faster rate each year

Explanation:

Answer:

C. From the lemonade to the ice cube.

Explanation:

:) ICE = COLD

HEAT FROM ROOM TEMP. GOES INTO THE ICE CUBES

∵∴∵∴if this doesn't  help then i dONT kNOW ∞∵∴

Answer:

GGTT,100% green and tall

Explanation:

Answer:

Well for this question it is necessary that you upload the image.

Although I would tell you that whenever mRNA is affected, protein synthesis is one of the most important and relevant causes in cell life.

Explanation:

Another fact to add is that according to the protein that is selected, determine the vitality or not of the cell.

In the inoculation of the toxin if the synthesis of a protein that makes up the membrane structure, or of the fundamental structures for vitality, is affected, the cell will go into apoptosis or die.

On the other hand, if the protein synthesis is referred to some enzyme, or a second protective messenger, the cell continues with its vitality.

The ribosomes would be the most negatively impacted structure by the toxin that disrupts ribosomal RNA (rRNA) synthesis, option A.

Ribosomes are responsible for protein synthesis, and they are made up of rRNA and proteins. Without rRNA, ribosomes cannot be assembled, and protein synthesis cannot occur. The other labeled structures in the image are the nucleus, the endoplasmic reticulum, and the Golgi apparatus.

These structures are involved in other cellular processes, such as DNA storage, protein folding, and lipid synthesis. While disruption of these processes would also have negative consequences for the cell, the impact would not be as severe as the disruption of ribosome function.

So the answer is A - Ribosomes.

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Nitrification is the process that converts ammonia to nitrite and then to nitrate and is another important step in the global nitrogen cycle.

The conversion of nitrogen gas in the air to ammonia and nitrates, usable by plants, is performed by bacteria through a process known as nitrogen fixation. The ammonia is then converted into nitrates in a process called nitrification. This allows plants to absorb nitrates from the soil to make proteins and other compounds.

The process by which bacteria convert nitrogen gas in the air to ammonia and nitrates is called nitrogen fixation.

These are specialized bacteria often found on the root nodules of leguminous plants or in the soil. The nitrogen gas (N₂) is converted to ammonia (NH₃) through a process involving several steps guided by enzymes.

This ammonia can then be converted into other forms like nitrate (NO₃⁻) by other bacteria in the soil, in a process known as nitrification. Plants can absorb these nitrates from the soil and use them to make proteins and other necessary compounds.

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Answer:

The data provides important information about the specific protein needed to induce cells to start the cell cycle, so to overcome an injury the cells need to divide and overcome the wound by repairing it, for this it will be necessary to deliver the appropriate protein to the cell. A new sign of how a protein inhibits the entry of cells into the cell cycle is also observed.

Due to recent discoveries in neurogenesis, scientists believe that neural stem cells can form new neurons, providing potential treatments for spinal cord injuries even though CNS neurons typically do not divide.

The scientists predict that they can use data from their experiment to help treat individuals who suffer from spinal cord injuries, despite neurons in the central nervous system (CNS) being in G0 of the cell cycle and generally not dividing in response to an injury. This prediction is supported by the understanding that the CNS is composed of the brain and spinal cord, where neurons are responsible for transmitting information and are essential for bodily functions. However, unlike other cells in the body such as skin or bone cells, neurons do not readily divide and form new cells after damage, which usually results in the permanent loss of certain functions.

Recent findings in neurogenesis reveal that new neurons can be formed from the division of undifferentiated neural stem cells found in the brain, even in adults. This process shows potential in developing therapeutic strategies to treat spinal cord injuries and other nervous system damages. Therefore, if scientists can harness this capability, they might be able to promote the repair of the nervous system following injury by encouraging the growth of new neurons or the restoration of neural functions.

Answer:

A DNA molecule is a polymer, specifically being a type of polymer known as a polynucleotide. In other words, it is made up of many nucleotides. Each nucleotide is made up of three main parts: one or more phosphate (P) groups, a nitrogenous base (adenine, guanine, cytosine, or thymine), and a deoxyribose (pentose, 5-carbon) sugar. Adenine always binds/hydrogen bonds to thymine, and guanine always to cytosine. (According to Chargaff's rules, the amount of pyrimidines is always equal to that of purines.) Hope this helps! :)

DNA is a double helix structure made of nucleotides. Each nucleotide comprises a nitrogenous base, a five-carbon sugar (deoxyribose), and a phosphate group. The backbone is made of the sugar and phosphate groups, while the nitrogenous bases are on the inside.

The DNA molecule, deoxyribonucleic acid, is a double helix structure formed by two polymers wound around each other. DNA is made up of small units called nucleotides. Each nucleotide is made of a nitrogenous base, a five-carbon sugar called deoxyribose, and a phosphate group. The pair of strands forming the DNA molecule are held together by hydrogen bonds between the nitrogenous bases, which include adenine (A), thymine (T), cytosine (C), and guanine (G). The sugar and phosphate groups form the backbone of the molecule, while the nitrogenous bases are on the inside.

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