5. Besides being part of the composition of bone, why else do mammals need calcium?

Answer: B :)

Explanation:

Answer: vestigial

Explanation: Vestigial structures are organs or anatomical structures that have been retained during evolution even though they have lost some of their ancestral functions.

warm front

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Answer:

choice: D (Warm font)

Explanation:

Answer:

plssssssszz I beg u

Explanation:

mark me as brainlist

Answer:

The answer is Beryllium

Answer:

d) Water is necessary for cellular functions.

Explanation:

if we cant work on a cellular level, we wont work at all!

hope i helped!

Answer:

the answer is d) in edge 2021

Explanation:

water is necessary for cellular functions

HOPE THIS HELPS

According to the information, we can infer that the Independent variable: Temperature (specifically, the range of temperature). On the other hand, Dependent variable: Distribution of pikas. Additionally, Control: Pikas within their tolerance range of temperature and Constants: Other environmental factors, habitat conditions, and population of pikas.

In this experiment, the independent variable is the temperature, specifically the range of temperature. The researcher will manipulate and observe how different temperature ranges affect the distribution of pikas.

The dependent variable is the distribution of pikas. It refers to the geographical or spatial range in which pikas are found. The researcher will measure and analyze how the distribution of pikas changes in response to different temperature ranges.

To ensure test validity, a control group of pikas within their tolerance range of temperature needs to be included. This group will experience temperatures within the range they can tolerate, providing a baseline for comparison. By comparing the distribution of pikas in different temperature ranges to the control group, the researcher can determine the impact of temperature on their distribution.

To maintain validity, other environmental factors such as altitude, precipitation, vegetation, and habitat conditions should be kept constant across the experimental groups. Additionally, the population of pikas being studied should be consistent, without any significant changes in population size or genetic composition throughout the experiment. These constants help isolate the effect of temperature on pika distribution and minimize confounding variables.

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Immunological memory refers to the ability of the immune system to react previous antigen infections.

The primary immune response refers to the initial interaction between the immune system with  pathogenic microorganisms (e.g., bacteria).

The secondary immune responses refer to the second contact with the same pathogenic organism, which enables to the organism create specific antibodies against this pathogen through a process called immunological memory.

Active Immunity is a term used to refer to a type of acquired immunity caused by previous exposure to a pathogenic microorganism and/or vaccine inoculation.

Immunological memory leads to a faster and better response of the immune system against pathogen reinfection.

In conclusion, immunological memory refers to the ability of the immune system to react previous antigen infections.

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Answer:

Decomposers play a critical role in the flow of energy through an ecosystem. They break apart dead organisms into simpler inorganic materials, making nutrients available to primary producers.

Explanation:

HI!

The answer would be A. Four long, zero short.

Here's why:

When looking at Punnett squares, you want to see if they are one thing or the other.

In this case, we are looking to see if the needles are long or short.

To figure this out, we can look in the boxes.

The top row has long needles because both of the letters are capitalized.

The second row is sort of confusing.

Both boxes have one capital letter and one lowercase letter.

When this happens, for this case, they are both long.

I hope this helps!

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From the exposed punnett square, we can assume the complete sentence is as follow: In a dihybrid cross of heterozygous pea plants with round (R) and yellow (Y) seeds, there will be a phenotypic ratio of 9 round and yellow seeds : 3 round and green seeds : 3 wrinkled and yellow seeds : 1 wrinkled and green seeds.

The Punnett square is a graphic representation that shows the different types of gamete combinations according to the alleles involved in a cross.

Punnett square shows the probabilities of getting offspring with different genotypes and their consequent phenotypes.

In the exposed punnett square, we can see four types of gametes produced by each parent. Two genes are involved in the cross and the gametes depend on the allele combination.

- Gametes: RY, Ry, rY, ry

- Parental genotype: RrYy

- Alleles

From this cross between teo dihybrid individuals, we get

According to this information, the complete sentences are

In a dihybrid cross of heterozygous pea plants with round (R) and yellow (Y) seeds, there will be a phenotypic ratio of 9 round and yellow seeds : 3 round and green seeds : 3 wrinkled and yellow seeds : 1 wrinkled and green seeds.

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Unraveling past climate changes is important because it helps us to understand the causes and consequences of climate change.

Climate change refers to the long-term changes in temperature and weather patterns. These may be natural or man-made changes.

Some examples of climate changes include sea level rise, rapid loss of ice mass loss in Greenland, Antarctica, and the Arctic, changes in floral and plant blossoming, and extreme weather occurrences.

Some methods by which past climate changes can be detected include:

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Complete question:

Explain why unraveling past climate changes is important and discuss several ways in which such changes are detected.

Answer:

blood vessels that carry blood with oxygen is called aries .

blood vessels that carry blood without oxygen is called veins

This is an example of exponential growth.

Exponential growth refers to a pattern of growth where the quantity or size of something increases at an accelerating rate over time.

In the given scenario, Brain has one son, two grandchildren, and three great-grandchildren.

Each generation is producing more offspring, resulting in a rapidly increasing number of descendants.

The progression from one generation to the next demonstrates exponential growth because each subsequent generation adds more individuals than the previous one.

As the generations continue, the number of descendants grows exponentially larger.

Exponential growth can be observed in various natural and human-made systems, such as population growth, compound interest, and the spread of infectious diseases.

In this case, the number of descendants in Brain's family tree follows an exponential pattern, as each new generation multiplies the number of offspring, leading to a significant growth rate.

Therefore, the example given aligns with the concept of exponential growth.

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Answer:

Photosynthesis? I guess.

Answer:

During photosynthesis

Answer:

Impacts from human activity on land and in the water can influence ecosystems profoundly. Climate change, ocean acidification, permafrost melting, habitat loss, eutrophication, stormwater runoff, air pollution, contaminants, and invasive species are among many problems facing ecosystems.

Answer:

The statement is false. Unicellular Organisms also respire.

Explanation: Respiration is the process by which an organism intales Oxygen and releases Carbon Dioxide along with energy in the form of ATP(Adenosine TriPhosphate). It is necessary for every organism. Hence Unicellular Organisms ALSO RESPIRE

The beak depth vs time graph that represents the change in finch beak depth that would occur during a sustained drought is: (b) Graph 2.

Define time graph ?

A time graph, also known as a line graph or a line chart, is a graphical representation of data that shows how a variable changes over time. The x-axis of a time graph represents time, usually measured in equal intervals such as days, weeks, months, or years, while the y-axis represents the value of the variable being measured.

The beak depth vs time graph that represents the change in finch beak depth that would occur during a sustained drought is:

b. Graph 2, which shows an increase in beak depth from 10 mm to 13 mm over 5 years, indicating that the finch population experienced a directional selection for deeper beaks due to the drought, which favored individuals with larger beaks that were better able to crack open the available hard seeds. Graphs 1 and 3 show no change in beak depth over time, while Graph 4 shows a slight increase in beak depth but not as significant as Graph 2.

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Answer:

Energy

Explanation:

The matter in an animal body is not capable of moving and changing without energy.

Fresh water lakes are used to help store fresh water for flood control, irrigation, hydroelectric power and recreation.

Desalination is the process by which excess dissolved mineral salt is removed from barkish water to make it suitable for human use and agriculture.

According to the options:-

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Environmentally compatible features are favoured by natural selection. New qualities emerge as a result of natural selection.

According to the Natural selecting, organisms breed more young than they can withstand in their surroundings. Those who are more physically capable of surviving, maturing, and reproducing.

Evolutionary Process the process by which organisms with stronger environmental adaptations typically survive and have more progeny. Evolution. any shift across generations in the phenotypes (inherited traits) of a heterogeneous population.

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Answer:

1. the cytoplasm divides

2. a process by which cells become specialised

3. they are unspecialized

you literally have astericks (***) by each correct answer

Answer:

TRUE!!!

Explanation:

In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure.

hope this helps! :D

A chromosome is a coiled DNA and protein structure that develops in the cell nucleus during cell division.

Thus, chromosomes are important for transporting and passing genetic information from one generation to the next. They house an organism's genetic material. When cells divide, they become visible under a microscope and take the form of compressed formations. Every species has a certain number of chromosomes.

Chromosomes are essential for cell division because they make sure that genetic material is accurately distributed to daughter cells. For effective cell function and heredity, they must have a compact and well-organized structure made of DNA securely coiled around histone proteins.

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Answer:

If cleaved by trypsin you will need to do gel-filtration, if cleaved by chymotrypsin you will need to do ion-exchange.

Explanation:

Answer:

Energy in an ecosystem: is part of an open system, is recycled and reused, is transferred through the food chain and is lost as heat.

Answer and Explanation:

The brain is composed of three main structures, the cerebrum, cerebellum, and brain stem. The brain sends chemical and electrical signals throughout the body to regulate different biological functions and sense environmental changes. The brain communicates with the majority of the body through the spinal cord.