Name a metal metalloid

Answers

Answer 1

Answer:

Answer:

boron, silicon, germanium, arsenic, antimony, and tellurium.

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Describe the basic functions of animal body systems.

Answers

The basic functions which are important for the survival of an organism include processes such as homeostasis, nutrient absorption and distribution in body, reproduction, and defense against injury or pathogens.

What are animal body systems?

There are usually nine organ systems present in an animal which includes skeletal, muscular, nervous, endocrine (hormonal), digestive, respiratory, circulatory, excretory (urinary), and reproductive system. Each of these systems perform a specific function.

The Skeletal system provides the body structure and is responsible for the movements of different body parts. The muscular system is made up of all the muscles which are present in the body, these help in connecting different body parts to the skeletal system. The nervous system consist of the brain and the spinal cord, this system is responsible for coordinating different functions in the body.

The endocrine system is responsible for secreting hormones which are responsible for the growth and development of body. The digestive system helps in absorbing the energy present in the food and distributing the energy. The circulatory system is responsible for the circulation of gases and different molecules across the body through blood vessels.

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Answer:

The heart pumps blood through the circulatory system, delivering needed materials (glucose, oxygen) and picking up waste (carbon dioxide) from cells all over the body. Organs systems work together to efficiently and effectively provide all body cells with their basic needs to carry out life functions.

Which of the following organisms has a closed circulatory system? a. Sponges
b. Cnidarians
c. Nematodes
d. Insects
e. Vertebrates

Answers

Answer:

The correct answer is E. Vertebrates have a closed circulatory system.

Explanation:

The main mission of the circulatory system is to deliver oxygen and nutrients to all body cells.

In the closed circulatory system, blood travels inside a network of blood vessels, without leaving them. The material transported by the blood reaches the tissues through diffusion. It is characteristic of all vertebrates, including humans.

What are two main abiotic factors that affect organisms in marine ecosystems? A. Oxygen level and water temperature B. Predators and competition C. Salinity and water temperature D. Predators and food availability

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Answer:

dear user the answer is option A.oxygen level and water temperature and C.salinity and water temperature.

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Answer:

It would be A

Explanation:

"What would Avery, Macleod, and McCarty have concluded if their results had been that only RNAse treatment of the heat-killed bacteria prevented transformation of genetic virulence?

Answers

Answer:

RNA was the genetic material

Explanation:

If avary, Macleod, and McCarty would have seen that only RNAse treatment of the heat-killed bacteria prevented the transformation of genetic virulence than might have concluded that RNA is the genetic material as transformation does not occur because the RNAase degraded the RNA.

But if the genetic material is DNA then RNAase will not work because RNAase can not degrade DNA and then DNA will pass from virulent heat killed strain to nonvirulent strain and will cause transformation.

A change in genotype, but not in phenotype, is most likely due to _________.

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A change in genotype, but not in phenotype, is most likely due to neutral mutation.

A mutation consists of a spontaneous and unpredictable change in the sequence of genes that make up the DNA of a living being.

A neutral mutation is one that has no consequences on the phenotype, that is, it has no effect on the observable characteristics of an organism.

Neutral mutations has effects on the genotype because it generates a change in the order of nucleotides that creates triplets that code for equivalent amino acids as basic amino acids.

Therefore, we can conclude that a neutral mutation does not affect the viability of the living being.

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a point mutation in the third position of a DNA triplet! hope this helped :)

HELPPP PLEASE I’LL GIVE A LOT OF POINTSa) Explain how animals with radial symmetry differ from animals with bilateral symmetry.

b) Give an example of an animal with radial symmetry and an example of an animal with bilateral symmetry.

Answers

A) Any plane via the central axis can be used to divide radially symmetrical creatures into symmetrical halves. Animals with bilateral symmetry can only be divided into equal halves along a single particular plane that passes through a central axis.

B) radial: starfish bilateral: dogs

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1) Using a ruler to measure the length of a stick is an example of A) predicting the length of the stick by guessing B) measuring the rate of change of the stick by making inferences C) extending the sense of sight by using an instrument D)calculating the percent of error by using a proportion

Why is a cap added to mRNA, but not to tRNA or rRNA?A-Transfer RNA and rRNA exhibit complex structures with double stranded regions. The three-dimensional shapes of these molecules keep the 5\' end of the RNA away from the enzymes that process the cap.B-Transcription and processing of mRNA occur in the nucleus, where cap binding proteins are found. These proteins, which add and modify the cap, are not found in the cytoplasm, where tRNA and rRNA are transcribed and processed.C-Each of the three types of RNA are transcribed by different RNA polymerases. Only RNA polymerase II, involved in mRNA synthesis, contains a domain capable of interacting with enzymes that form the cap.D-Only mRNA contains introns. Capping occurs simultaneously with intron removal because the same enzymes and proteins involved in both of these processes must bind to RNA at the same time.