The image shows a portion of the fossil record that spans several million years. In the image, the numbers designate different rock layers, with the number 1 corresponding to the oldest rock layer.

What statement provides the best explanation for the change in the species between rock layer 1 and rock layer 2?
A. An abrupt change in the environment caused the original species to evolve into several new species.
B. The original species hybridized with a single new species, resulting in a variety of species.
C. Humans introduced several new species into the environment after the original species had died out.
D. The original species died out, and several new species evolved that were better suited to the environment.

Answer:

true

Explanation:

i took the test

The statement "Newton's third law of motion states that whenever a first object exerts a force on a second object. The first object experiences a force equal in magnitude but opposite in direction to the force that it exerts" is true.

His third law argues that there is an equal and opposite reaction to every action (force) in nature. When object A pulls on item B, object B pulls back on object A with an equal and opposing force. In other words, interactions lead to forces.

According to the first law, until a force acts on an item, it will not alter its motion. According to the second law, an object's force is determined by multiplying its mass by its acceleration. According to the third law, when two objects interact, they exert equal-sized and opposite-direction pressures upon one another.

Therefore, the statement is true.

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Answer:

food availability, water, and space

Explanation:

hope this helps have a good rest of your night :) ❤

Answer:

I think it is the first option however if that is wrong it may be the third I highly doubt that it is the second or last options.

Explanation:

Sorry I couldn't pin the exact answer haven't been in biology in a couple of years.

Does the cost of the technology required to create a clone exceed the benefit of producing it? is the question that can be researched to study the effect of cloning on the economy.

Hence, Does the cost of the technology required to create a clone exceed the benefit of producing it? is the question that can be researched to study the effect of cloning on the economy.

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The best option that describes the role of the small intestine in digestion is (C) it helps in the absorption of nutrients from food.

The small intestine is a vital part of the digestive system, and its main role is to facilitate the absorption of nutrients from the food we eat. After food is partially digested in the stomach, it enters the small intestine, where it is broken down further by enzymes secreted by the pancreas and bile from the liver.

The walls of the small intestine are lined with small finger-like projections called villi, which greatly increase the surface area available for nutrient absorption.

As food passes through the small intestine, nutrients such as carbohydrates, proteins, and fats are absorbed through the villi and into the bloodstream, where they can be transported to the cells throughout the body to be used as energy or for other purposes.

In addition to nutrient absorption, the small intestine also plays a role in the digestion of carbohydrates and proteins, and it helps to regulate the release of digestive enzymes and hormones.

Overall, the small intestine is a crucial component of the digestive system, and its proper functioning is essential for maintaining good health and well-being.

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Answer:

A. a phylogenetic tree. it says that i need 20 more characters to enter so this is me wasting them. but the answer is A

The given diagram basically represents a cladogram. The correct option is D.

A cladogram is a type of diagram that depicts the evolutionary relationships between organisms.

It is a branching diagram in which the nodes represent the descendants' most recent common ancestor. The cladogram is based on the organisms' shared characteristics or traits.

These characteristics, which can be physical or genetic in nature, are used to classify organisms into clades.

Clades are groups of organisms that share a common ancestor, and they are represented on the cladogram as branches.

The organisms are more closely related the closer the branches are to each other. Cladograms are commonly used in biology to study organisms' evolutionary histories.

Thus, the correct option is D.

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The methods which are actively involved in preventing  the transmission of the flu are as follows:

The flu is caused by the influenza virus that contaminates the respiratory organs primarily. These viruses are spread from one infected person to another, the use of infected objects, direct contact between individuals, etc.

Flu disease is a contagious disease that is easily transmitted from person to person. In this case, one must be passively aware of its causes, prevention, and medication in detailed information.

Therefore, it is well described above.

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Answer:

B. She was on the continental shelf, not the continental rise.

Explanation:

The continent first contacts the ocean at the continental shelf. After a while, the continental shelf ends in a steep decline known as the continental slope. The  continental slope eventually levels out into a gradually sloping continental rise which eventually becomes the ocean floor.

The part of her story that needs to be corrected is that she was on the continental shelf, not the continental rise. The correct option is B.

A continental shelf is a portion of a continent that is submerged beneath a shallow body of water known as a shelf sea.

During glacial periods, sea level drops exposed many of these shelves. The shelf surrounding an island is known as an insular shelf.

The continental shelf is where the continent first makes contact with the ocean. The continental shelf eventually ends in a steep decline recognized as the continental slope.

The continental slope eventually flattens out and becomes a gradually sloping continental rise, which eventually becomes the ocean floor.

Her story needs to be corrected because she was on the continental shelf, not the continental rise.

Thus, the correct option is B.

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Answer: No

Explanation:

Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.

Answer:

Significance of Photosynthesis. Photosynthesis is the process by which green plants, in the presence of light combine water and carbon dioxide to form carbohydrates. Oxygen is released as a by product of photosynthesis.

Explanation:

Answer:

Since every person inherited DNA from their parents, who inherited it from their parents, and so on, a person's DNA is made up of the DNA of their ancestors. If you and another person both have the same ancestor, there's a chance that you both inherited some of the same DNA.

Explanation:

Plz mark brainliest thanks

Answer: mutations that natural selection can work on. 4.) How do scientists calibrate a molecular clock? ... they compare the number of positive mutations that have occurred in a particular species with the number of negative mutations that have occurred

Explanation:

Answer:

46

Explanation:

23 chromosomes from the egg (mom) and 23 from the sperm (dad)

Answer:

The correct answer is B. New compounds with lower-energy bonds must be formed when the high-energy bonds in food molecules are broken.

Explanation:

During cellular respiration the bonds of food molecules are broken so energy can be released to fuel other cellular processes in order for this to occur which of the following statements must be true a the new compounds that are formed must be more complex than the food molecules that were broken

Answer:

producers

Explanation:

hope this helps

Answer: Plants, algae, and a group of bacteria called cyanobacteria are the only organisms capable of performing photosynthesis.

Explanation: Because they use light to manufacture their own food, they are called photoautotrophs (literally, “self-feeders using light”).

Answer:

Yes, mixtures can be separated using a variety of techniques.

Answer:

Global winds(?)

Explanation: Hope this helps, correct me if I am wrong.

(Edited - Winds, not breezes.)

Answer:

I Feel Lonely: What To Do When You're Feeling Alonewww.psychalive.org › isolation-and-loneliness

When we are lonely, we are more likely to see things as hopeless. ... There are actions you can take to combat feeling alone and begin to have more ... Because our brains do not respond positively to seclusion, place yourself in social ... PsychAlive PsychAlive is a free, nonprofit resource created by the Glendon Association

Explanation:

eres hermosa e inteligente y mucha gente te quiere así que no dudes de ti mismo así que no te preocupes

Answer:

An earthworm's internal organs can be viewed through a dissecting microscope. This type of microscope allows enhanced observation of objects that are too large for a compound microscope. Because the magnification is low, this microscope cannot be used to examine cells.

Answer:

haemoglobin in blood increases at high altitude. This is one of the best-known features of acclimatisation (acclimation) to high altitude. Increasing the amount of haemoglobin in the blood increases the amount of oxygen that can be carried.

Answer:

Diffusion

Explanation:

Facilitated diffusion = carrier mediated transport.

Answer:

5000 mg are in 5 g.

Explanation:

Hope this helps!

multiply the mass value by 1000. 5x1000

Answer:

5000 mg

Explanation: you would do 5g X 1000

Explanation:

Introduction

Plants have evolved different reproductive strategies for the continuation of their species. Some plants reproduce sexually while others reproduce asexually, in contrast to animal species, which rely almost exclusively on sexual reproduction. Plant sexual reproduction usually depends on pollinating agents, while asexual reproduction is independent of these agents. Flowers are often the showiest or most strongly-scented part of plants. With their bright colors, fragrances, and interesting shapes and sizes, flowers attract insects, birds, and animals to serve their pollination needs. Other plants pollinate via wind or water; still others self-pollinate.

Asexual Reproduction

Vegetative reproduction is a type of asexual reproduction. Other terms that apply are vegetative propagation, clonal growth, or vegetative multiplication. Vegetative growth is enlargement of the individual plant, while vegetative reproduction is any process that results in new plant “individuals” without production of seeds or spores. It is both a natural process in many, many species as well as a process utilized or encouraged by horticulturists and farmers to obtain quantities of economically-valuable plants. In this respect, it is a form of cloning that has been carried out by humanity for thousands of years and by plants for hundreds of millions of years. Sexual Reproduction and The Flower

The flower is the reproductive organ of plants classified as angiosperms. All plants have the means and corresponding structures for reproducing sexually. The basic function of a flower is to produce seeds through sexual reproduction. Seeds are the next generation, serving as the primary method in most plants by which individuals of the species are dispersed across the landscape. Actual dispersal is, in most species, a function of the fruit (a structural part that typically surrounds the seed).

image

Plants and sexual reproduction: Plants that reproduce sexually often achieve fertilization with the help of pollinators such as (a) bees, (b) birds, and (c) butterflies.

Sexual Reproduction in Gymnosperms

Gymnosperms produce both male and female gametophytes on separate cones and rely on wind for pollination.

image

Male and female gametophytes: These series of micrographs shows male and female gymnosperm gametophytes. (a) This male cone, shown in cross section, has approximately 20 microsporophylls, each of which produces hundreds of male gametophytes (pollen grains). (b) Pollen grains are visible in this single microsporophyll. (c) This micrograph shows an individual pollen grain. (d) This cross section of a female cone shows portions of about 15 megasporophylls. (e) The ovule can be seen in this single megasporophyll. (f) Within this single ovule are the megaspore mother cell (MMC), micropyle, and a pollen grain.

Female Gametophyte

The female cone also has a central axis on which bracts known as megasporophylls are present. In the female cone, megaspore mother cells are present in the megasporangium. The megaspore mother cell divides by meiosis to produce four haploid megaspores. One of the megaspores divides to form the multicellular female gametophyte, while the others divide to form the rest of the structure. The female gametophyte is contained within a structure called the archegonium.

Reproductive Process

Upon landing on the female cone, the tube cell of the pollen forms the pollen tube, through which the generative cell migrates towards the female gametophyte through the micropyle. It takes approximately one year for the pollen tube to grow and migrate towards the female gametophyte. The male gametophyte containing the generative cell splits into two sperm nuclei, one of which fuses with the egg, while the other degenerates. After fertilization of the egg, the diploid zygote is formed, which divides by mitosis to form the embryo. The scales of the cones are closed during development of the seed. The seed is covered by a seed coat, which is derived from the female sporophyte. Seed development takes another one to two years. Once the seed is ready to be dispersed, the bracts of the female cones open to allow the dispersal of seed; no fruit formation takes place because gymnosperm seeds have no covering.

Answer:

Pea plants were fundamental in allowing him to understand the means by which traits are inherited between parent and offspring. He chose pea plants because they were easy to grow and could be bred rapidly and had many several observable characteristics like petal color and pea color. Mendel used a tall plant and a small plant expecting a medium plant to com out. That was not the case one tall plant came out and so did 3 small ones. This is because of genetics. And the genetic chart showing what the percents are.

Explanation:

All photosynthetic organisms have chloroplasts. This is definitely false because only photosynthetic eukaryotes have chloroplasts. Thus, the correct option is 1.

Photosynthesis may be defined as a process through which green plants and some photosynthetic algae synthesize their own food with the help of carbon dioxide and water in the presence of sunlight.

Cyanobacteria are the largest and most diverse group of photosynthetic bacteria that perform photosynthesis without having the chloroplast. This type of bacterial organism is generally classified into prokaryotes.

Hence, the chloroplast is only present in the members of photosynthetic organisms that belong to the eukaryotic category.

Therefore, the statement "All photosynthetic organisms have chloroplasts" is definitely false.

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Answer:Marsupial mammals on Australia likely evolved from a common ancestor. ... Because Australia was isolated by water for millions of years, these species were able to evolve without competition from (or exchange with) mammal species elsewhere in the world.

Explanation:

Answer:

Biogeography is the study of the geographical distributions of biological organisms. For scientists who study evolution, biogeography is often an important part of their analysis, because it provides compelling proof for their theory. This is because many geographical features, such as oceans, rivers, mountains and islands, provide barriers to species, allowing scientists to observe how they evolve separately from one another.

Explanation:

Answer:1d2c3b4a

Explanation: