Questions
How does an animal interpret the location of a sound?   part of the brain is responsible...

How does an animal interpret the location of a sound?  

part of the brain is responsible for integrating this?

In: Biology

(a) A full explanation of the role of the endocrine and nervous systems in maintaining homeostasis....

(a) A full explanation of the role of the endocrine and nervous systems in maintaining homeostasis.

(b) A detail explanation for both recessive and dominant genetic disease inheritance. Please answer this two question

In: Biology

1. explain the difference between an ionic, covalent, and hydrogen bond. 2. draw and describe the...

1. explain the difference between an ionic, covalent, and hydrogen bond.

2. draw and describe the electronic configuration pf NaCI before and after the transfer of electrons.

3. what are the four major macromolecules and what are the corresponding building blocks from which each of these macromolecules are made?

4. draw and describe an example of a reaction that shows how a dipeptide is formed and broken down.

5. explain how each of the macromolecules contributes to the development and maintenance of hair.

6. describe each level of protein structure: 1. Primary, 2. secondary, 3. tertiary, 4. quaternary. what type of chemical bonds stabilize these different structures and how?

7. briefly compare and contrast oxidizing and reducing reagents and the role that they play in building chemical bonds.

8. what happens to the protein structure (keratin) of curly hair after a chemical relaxer and heat are applied and what happens to straight hair after a chemical perm or relaxer is applied?

In: Biology

Name any two parts of the compound light microscope and their specific functions.

Name any two parts of the compound light microscope and their specific functions.

In: Biology

Which of the following statements is a false statement about the secondary immune response? a.) the...

Which of the following statements is a false statement about the secondary immune response?

a.) the secondary immune response produces less antibodies compared to the primary immune response

b.) the secondary immune response is a targeted response to a specific pathogen

c.) the secondary immune response is part of the adaptive immune system

d.) the secondary immune response is faster acting in the presence of a pathogen compared to the primary immune response

e.) all of the answer choices are correct statements about the secondary immune response, none are false

In: Biology

Some sports such as figure skating, diving, dance, horse racing and boxing are more likely to...

Some sports such as figure skating, diving, dance, horse racing and boxing are more likely to place female athletes at risk for eating disturbance or disorder development. Discuss why you think these types of sports are more likely to place athletes at risk?

In: Biology

Complete the following table by writing the name of the cell structure or organelle in the...

Complete the following table by writing the name of the cell structure or organelle in the right hand column that matches the structure/function in the left hand column. Structure/Function Cell structure

1. May store water, needed chemicals and wastes in plant cells

2. The “sugar factory” in plant cells that contains chlorophyll

3. Small structure that makes protein

4. Long whip-like structures used for movement

5. The region of the cell between the plasma membrane and the nucleus

6. Cell control center

7. Sac of digestive enzymes

8. Boundary between the cell and its surroundings

9. Small hair-like structures used for movement

10.Produces a usable form of energy (ATP) for the cell

11.“Ships” products to plasma membrane for export outside the cell

12.Consists of hollow tubes which provide support for the cell

13.Lipids manufactured here

14.Numerous ribosomes give it its name

15.Breaks down drugs and toxin in liver

In: Biology

Gene is: LOC_Os05g38000 The gene name and chromosomal location. (Oryzabase) Number of exons and introns. (RGAP)...

Gene is: LOC_Os05g38000

  1. The gene name and chromosomal location. (Oryzabase)
  2. Number of exons and introns. (RGAP)
  3. Describe the expression pattern. This will require some research as there is no convienent Atlas.

Can someone please help with this question!

In: Biology

x Identifying the Skeletons You are a scientist specializing in investigating skeletal remains at the Earth...

x

Identifying the Skeletons

You are a scientist specializing in investigating skeletal remains at the Earth Museum of Natural History. In today's mail you receive a package of bones from some archeologists who have been hunting for the last known location of a famous explorer, Gabriela Molina, age 54, and her two assistants, Cordelia Kelley, age 28, and Ian Dumais, age 24. Included in the package are six well-preserved arm and leg bones, each of which is labeled. There is one radius (R1) and one ulna (U1); these are the two bones that connect the wrist and elbow. There are two humerus bones (H1 and H2). The humerus connects the shoulder and the elbow. There are two femurs (F1 and F2). The femur is the large bone in the thigh which connects the hip to the knee.

The data chart, prepared by your assistant, indicates the length of each of these bones. These measurements can be used to estimate how tall the deceased individuals might have been. Based on ratios between bone lengths and body height, your assistant has calculated possible heights for the people whose bones you received. There is no evidence, however, to show whether the bones belonged to a man or a woman. Since the ratios of bone lengths to body height are different for men and women, the chart includes estimates for both genders. For example, H1 is 39.1 centimeters long, and so could have come from a man who was 186.2-194.2 centimeters tall, or a woman who was 183.2-191.2 centimeters tall. Dr. Molina was approximately five feet five inches tall. Her female associate, Dr. Kelley, was approximately four feet ten inches tall. Mr. Dumais was significantly taller, but your files do not list a specific height for him. (Remember to convert height to metric system units cm – centimeters)

Specimen

Measurement

Male Height Range

Female Height Range

H1

39.1cm

186.2-194.2cm

183.2-191.2cm

H2

32.27cm

164.5-172.57cm

161.2-169.2cm

R1

19.5cm

146.49-154.49cm

141.5-149.45cm

U1

22.5cm

150.9-158.97cm

147.8-155.8cm

F1

49cm

188.5-196.57cm

169.5-177.5cm

F2

45.42cm

180.47-188.47cm

161.02-169.02cm

Questions
Write your answers.

  1. From the data on the chart, what evidence supports the theory that these bones might indeed be the remains of the lost scientists?
  2. Which bones could possibly belong to which scientist? How do you know?
  3. Which bone is most difficult to assign to a certain individual? Why?

In: Biology

What is the difference between covalent bonds and ionic bonds? Covalent bonds are formed between atoms...

What is the difference between covalent bonds and ionic bonds?


Covalent bonds are formed between atoms to form molecules; ionic bonds are formed between atoms to form compounds.



Covalent bonds involve the sharing of pairs of electrons between atoms; ionic bonds involve the sharing of single electrons between atoms.



Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the sharing of protons between atoms.



Covalent bonds involve the sharing of electrons between atoms; ionic bonds involve the electrical attraction between atoms.
Atoms whose outer electron shells contain 8 electrons tend to

form ions in aqueous solutions.


form hydrogen bonds in aqueous solutions.


be stable and chemically nonreactive, or inert.


be both chemically inert and gaseous at room temperature.

Orange juice has a pH of 3 and Black coffee has a pH of 5 This means that:

Orange juice has 100 times more H+ions than Black coffee


Orange juice is less acidic than Black coffee


Orange juice has 4 times more H+ions than Black coffee


Black Coffee has 100 times more H+ions than Orange juice







Nitrogen (N) is much more electronegative than hydrogen (H). Which of the following statements is correct about the atoms in ammonia (NH3)?

The nitrogen atom has a slight positive charge; each hydrogen atom has a slight negative charge.

Each hydrogen atom has a partial positive charge; the nitrogen atom has a partial negative charge.

Each hydrogen atom has a slight negative charge; the nitrogen atom has a strong positive charge.


The nitrogen atom has a strong positive charge; each hydrogen atom has a strong positive charge.

Atomic number is best described as:

the number of protons in atom


the number of neutrons in atom


the number of electrons in the outermost shell of atom


only A and B

When two atoms are equally electronegative, they will interact to form

hydrogen bonds.


van der Waals interactions.


polar covalent bonds.


nonpolar covalent bonds.

The atomic number of neon is 10. Therefore, which of the following is most correct about an atom of neon?

It has an atomic mass of 10 daltons.


It has 8 electrons in its outer electron shell.


It is inert.


It has 8 electrons in its outer electron shell and it is inert.
About 25 of the 92 natural elements are known to be essential to life. Which four of these 25 elements make up approximately 96% of living matter?

carbon, sodium, hydrogen, nitrogen


carbon, oxygen, phosphorus, hydrogen

carbon, hydrogen, nitrogen, oxygen

oxygen, hydrogen, calcium, nitrogen

Which of the following is not considered to be a weak molecular interaction?

an ionic bond in the presence of water

a covalent bond


a van der Waals interaction


a hydrogen bond

Which statement is NOT true about the pH scale?

pH has a balanced level of H+and OH-


Anything below pH 7 is acidic and above pH7 is basic

The scale indicates the relative concentrations of hydrogen and hydroxyl ions in a solution.


all given statements are true

A covalent chemical bond is one in which

outer-shell electrons of two atoms are shared so as to satisfactorily fill the outer electron shells of both atoms.


protons and neutrons are shared by two atoms so as to satisfy the requirements of both atoms.


outer-shell electrons of one atom are transferred to fill the inner electron shell of another atom.


electrons are removed from one atom and transferred to another atom so that the two atoms become oppositely charged.





A covalent bond is likely to be polar when

one of the atoms sharing electrons is much more electronegative than the other atom.


one of the atoms has absorbed more energy than the other atom.


oxygen is one of the two atoms sharing electrons.


the two atoms sharing electrons are equally electronegative.

In what way are elements in the same column of the periodic table the same?

They have the same number of electron shells.


They have the same number of electrons in their valence shell.

They have the same number of protons.


They have the same number of neutrons
The nucleus of a nitrogen atom contains 7 neutrons and 7 protons. Which of the following is a correct statement concerning nitrogen?

The nitrogen atom has a mass number of 14 and an atomic mass of 7 grams.


The nitrogen atom has a mass number of approximately 7 daltons and an atomic mass of 14.


The nitrogen atom has a mass number of 14 and an atomic number 7

The nitrogen atom has a mass number of approximately 14 daltons and an atomic mass of 7.

Knowing just the atomic mass of an element allows inferences about which of the following ?

the number of protons plus neutrons in the element


the number of neutrons in the element


the chemical properties of the element

the number of protons in the element




_______have identical molecular formulas but the atoms in each molecule are arranged differently?


organic



homomolecules



isomer



isotope

Which statement is NOT true about ionic bonds?


electrons are completely lost or gained in ion formation



one atom acts as an electron donor and another acts as an electron acceptor

a salt such as NaCl is formed by an ionic reaction


an ion has the same number of electrons as a non-ionic atom of the same element
Why is each element unique and different from other elements in chemical properties


Each element has a unique atomic mass.


Each element has a unique atomic weight.



Each element has a unique number of neutrons in its nucleus


Each element has a unique number of protons in its nucleus.

Which of the following explains most specifically the attraction of water molecules to one another?

hydrogen bond



ionic bond



nonpolar covalent bond



polar covalent bond




Which bond or interaction would be difficult to disrupt when compounds are put into water?

ionic bond



hydrogen bond



van der Waals interaction



covalent bond

What results from an unequal sharing of electrons between atoms?


a polar covalent bond



an ionic bond



a hydrogen bond



a nonpolar covalent bond

which of the following molecules contains the most polar covalent bond?


H2O



H2



CO2


O2

Two atoms appear to have the same mass number. These atoms


must have the same number of protons + neutrons.


must have the same atomic number.


must have the same chemical properties.

must have the same number of electrons.





Electrons exist only at fixed levels of potential energy. However, if an atom absorbs sufficient energy, a possible result is that


an electron may move to an electron shell closer to the nucleus.



an electron may move to an electron shell farther away from the nucleus.



the atom would become a positively charged ion, or cation, and become a radioactive isotope.

the atom may become a radioactive isotope.

How many electrons are involved in a triple covalent bond?


one


six

three


two

From its atomic number of 15, it is possible to predict that the phosphorus atom has


15 neutrons.



15 electrons.



15 protons and 15 electrons.



15 protons.

Atoms of an element react is most related to the


number of electrons in the outermost shell



number of neutrons in the nucleus


number of electrons in the innermost shell

size of the nucleus



In: Biology

Which of the following chemical groups is important in energy transfer? -OH hydroxyl group -NH2 amino...

Which of the following chemical groups is important in energy transfer?

-OH hydroxyl group

-NH2 amino group

-SH sulfhydryl group

-OPO32- phosphate group

In: Biology

Use the Heap class provided to implement a sort routine in a Main class where the...

Use the Heap class provided to implement a sort routine in a Main class where the user enters a series of values, each value is then pushed onto a heap, then the values are printed out in ascending order.

public class Heap {
        public static final int SIZE = 1025;
        
        public Heap() {
                elt = new Element[SIZE];
                lastLoc = 0;
        }
        
        public void push(String k, Object o) {
                if (!fullCheck()) {
                        lastLoc++;
                        elt[lastLoc] = new Element(k,o);
                        int loc = lastLoc;
                        while (loc > 1 && elt[loc].key.compareTo(elt[loc/2].key) < 0) {
                                Element hold = elt[loc];
                                elt[loc] = elt[loc/2];
                                elt[loc/2] = hold;
                                loc = loc/2;
                        }
                }
        }       

        public void pop() {
                if (!emptyCheck()) {
                        elt[1] = elt[lastLoc];
                        lastLoc--;
                        int loc = 1;
                        while (2*loc <= lastLoc) {
                                loc = 2*loc;
                                if (loc < lastLoc && elt[loc +1].key.compareTo(elt[loc].key) < 0) loc=loc+1;
                                if (elt[loc].key.compareTo(elt[loc/2].key) < 0) {
                                        Element hold = elt[loc/2];
                                        elt[loc/2] = elt[loc];
                                        elt[loc] = hold;
                                }
                        }
                }
        }               
        
        public Object top() {
                return elt[1].payload;
        }

        public Object topKey() {
                return elt[1].key;
        }

        public boolean emptyCheck() {
                return (lastLoc == 0);
        }
        
        public boolean fullCheck() {
                return (lastLoc == SIZE-1);
        }
        
        
        private Element[] elt;
        private int lastLoc;
}
public class Element {
        public Element(String s) {
                key = s;
                payload = null;
        }


public Element(String s, Object obj) {
                key = s;
                payload = obj;
        }
        public String key;
        public Object payload;

}

In: Biology

For the ribosomes on nuclear envelope, what would be the proteins made here do?

For the ribosomes on nuclear envelope, what would be the proteins made here do?

In: Biology

sanger sequencing, and how base identity (A,T,C,G) is detected using fluorescence. Can you explain what it...

sanger sequencing, and how base identity (A,T,C,G) is detected using fluorescence. Can you explain what it means that the DNA is labeled with a fluorescent tag, and where that tag is located?

In: Biology

Cytogenetics of pumpkin

Cytogenetics of pumpkin

In: Biology