High School Level Science

Comparision between Perch and Grasshopper systems?

Comparision between Perch and Grasshopper systems?

I need to compare the digestive system, the respiratory system, and the circulatory system of a perch and a grasshopper. Please provide structure/function charts for each specimen and explain how each system works in the perch and the grasshopper.

narang   6620   4 Replies

bio_man

Which of the following pedigrees is not possible for inheritance of a X-linked

Which of the following pedigrees is not possible for inheritance of a X-linked

Which of the following pedigrees is not possible for inheritance of a X-linked trait? It appears that males inherit a condition from their mothers and not their fathers.

Question 43 options:
   
A.

   
C.

   

fosmanali01   6631   9 Replies

Arciaon

Grade 12 Bio Diagram Multiple Choice Questions! please help

Grade 12 Bio Diagram Multiple Choice Questions! please help

First diagram attached asks for:

In the diagram, the hormones FSH, LH, testosterone, and inhibin are labelled, respectively, as
a) 3, 2, 5, 1
b) 1, 2, 4, 5
c) 3, 2, 4, 5
d) 2, 3, 4, 5

Second diagram attache

princess001   6666   12 Replies

jginn01

Population growth questions

Population growth questions

1.The carrying capacity of the environment is related to factors affecting population growth such as
a) the ratio of the earth's land surface to the volume of the aquatic environment
b) only very small changes in the frequency of allel

princess001   6740   8 Replies

princess001

If total colour blindness was due to a gene located on the Y chromosome, then:

If total colour blindness was due to a gene located on the Y chromosome, then:

2) If total colour blindness was due to a gene located on the Y chromosome, then:

A) the trait would appear only when the individual inherited the dominant gene
 
B) males would inherit the gene from their mothers
 
C)

ZOË95   6779   13 Replies

mh.christina

osmotic and hydrostatic!

osmotic and hydrostatic!

Why would the osmotic pressure be low in someone who is starving?

Why is hydrostatic pressure low in someone who is bleeding?

Why is osmotic pressure low in someone who is having an allergic reaction?

BioDumby   6785   2 Replies

bio_man

Biodiversity and Biomagnification

Biodiversity and Biomagnification

Hi,
I have 2 questions that i need help with:

How does the cycling of a harmful element compare to a biogeochemical cycle?

What can biodiversity and biomagnification tell you about the biosphere’s state of equilibrium?

BlueMoon   6786   1 Reply

bio_man

Human Development help please!

Human Development help please!

During the first three days of development, the human embryo obtains nutrients and energy from the
a) mitochondria of the father's sperm
b) cytoplasm of the mother's egg
c) hCG
d) amniotic fluid

Technologies

biotoinquiry   6802   1 Reply

bio_man

The motor neuron will stimulate an effector if

The motor neuron will stimulate an effector if

1. The motor neuron will stimulate an effector if
a. a refractory period does not exceed the resting period
b. inhibitory substances pervent an overload at the synaptic junction
c. the travelling impulse does not affect the polarity o

banclare   6839   2 Replies

banclare

Two different genes control the expression of coat colour in an organism. The allele B produces a bl

Two different genes control the expression of coat colour in an organism. The allele B produces a bl

1.) Two different genes control the expression of coat colour in an organism. The allele B produces a black coat colour and the allele G produces a gray-stripped coat. The gene B influences the expression of gene G. The gray-stripped coat pattern app

bobdfhskafhs   6842   9 Replies

doseofmegan

Extending Mendel and STS

Extending Mendel and STS

First attachment asks for :
1. A drosophila with white eye colour was crossed with a Drosophila with apricot eye colour. 50% of the offspring had apricot eye colour and 50% had honey eye colour. The genotypes of the parents were E4E4 and
a)

princess001   6916   8 Replies

EA

The all or none principle of nerve action refers to the condition in which:

The all or none principle of nerve action refers to the condition in which:

The all or none principle of nerve action refers to the condition in which:

a) a stimulus activates energy nerve in the body or none of the nerves at all
b) all stimuli reaching nerve cells activate them; no stimulus goes unneeded

amer157   6917   1 Reply

duddy

Organisms that reproduce sexually

Organisms that reproduce sexually

Organisms that reproduce sexually have an evolutionary advantage over organisms that reproduce asexually. Explain and support this statement.

ghosthunter   6942   3 Replies

sarah!

Residue (lipis) and hydrogen bond question

Residue (lipis) and hydrogen bond question

A residue in the middle of a polypeptide has -CH3 as its side chain or R group. How many atoms does the residue contain?

(A) 7
(B) 9
(C) 10
(D) 12
(E) 13

--- attempted and think its 9 but arent sure at all

byahnoob   7077   3 Replies

duddy

A stroke has caused damage to certain areas of the brain. Upon examination, a doctor notices that ...

A stroke has caused damage to certain areas of the brain. Upon examination, a doctor notices that ...

A stroke has caused damage to certain areas of the brain. Upon examination, a doctor notices that the person has difficulty understanding speech and the left side of the body is paralyzed. identify the specific areas of the brain that are damaged, an

BIOLOGY FREAK   7091   1 Reply

bio_man

In females, puberty is initiated by secretion of the

In females, puberty is initiated by secretion of the

A contraceptive, the birth control pill, causes negative feedback on the pituitary which prevents the release of eggs. Typically, the hormones in the birth control pill are similar to
a) relaxin and gonadotropins
b) estrogen and progesteron

biotoinquiry   7138   2 Replies

bio_man

Grade 12 DNA questions

Grade 12 DNA questions

First attachment asks for
1. If tryptophan is synthesized, then the anticodon required is
a) UAG
b) ACU
c) TCC
d) ACC

Second attachment asks for
2. Which structures in the diagram of a human cell above contai

princess001   7163   6 Replies

Heena.13

population problem!

population problem!

Between 1996 and 2001, Cochrane Alberta was the fastest growing municipality in Canada, with a per capita growth rate of 0.589. There were about 7424 people living in Cochrane in 1996. How many people lived there in 2001?

12

lindsaym   7241   14 Replies

Mariam Awan

matter cycles and energy

matter cycles and energy

On Earth, matter cycles and energy “flows.”

a) To make this statement clearer, explain how the concept of matter is different from that of energy in matter and energy exchange in the biosphere.

b) Use graphics software to draw

BlueMoon   7343   3 Replies

bio_man

1. The onset of labour is partly due to decreased levels of:

1. The onset of labour is partly due to decreased levels of:

a) progesterone
b) luteinizing hormone
c) estrogen
d. Folicle stimulating hormone

2.Decribe the formation of the plancenta and explain its main functions

i.luv.ed   7347   4 Replies

bio_man

How is cloning done?

How is cloning done?

Natural cloning occurs with identical twins. This natural process involves the separation of early embryonic cells into two separate entities, each growing into a separate individual. Artificial cloning technique includes somatic cell nuclear transfe

needhelp321   7366   1 Reply

bio_man

The positive resting potential on the outside of nerve fibres is primarily due to the presense of ...

The positive resting potential on the outside of nerve fibres is primarily due to the presense of ...

NEED SOME HELP PLEASE  Grin

1. The positive resting potential on the outside of nerve fibres is primarily due to the presense of ions of
a) sodium
b) potassium
c) calcium
d) chloride

2. The initial phase

YMCMB   7405   3 Replies

bio_man

How are cellular respiration and glycolysis related?

How are cellular respiration and glycolysis related?

A. Glycolysis breaks down glucose to form the reactants of cellular respiration
B. Cellular respiration breaks down glucose to form the reactants of glycolysis
C. Cellular respiration is the reverse process of glycolysis
D. Cellular respiration uses

juliatong   7478   2 Replies

juliaroberts

The Optimum pH for pepsin?

The Optimum pH for pepsin?

I recently did a lab with egg whites and the enzyme pepsin. 
Out of the 5 test tubes, only the one with 5ml of hydrochloric acid and 5ml of pepsin dissolved the egg white.  However, before the egg white was put in the test tube, the p

bob-e   7496   3 Replies

bio_man

What is chloride anomaly?

What is chloride anomaly?

What is chloride anomaly?? Help.

heneral luna   7537   1 Reply

psyche360

What is the minimum size of the stimulus required to reach the threshold?

What is the minimum size of the stimulus required to reach the threshold?

In a class experiment, the strength of a neural stimulus and the resulting muscle contraction are compared. A single motor neuron that synapses with a muscle fibre is suspended. The other end of the muscle fibre is attached to a mass. If an electrica

EA   7637   2 Replies

padre

How do you study for your AB biology course?

How do you study for your AB biology course?

I'm new to this forum, but i wondering if you all had any tips for getting ready for the AP BIO exam!  I would love to know how any of you all have studied or would recommend studying!  

Gatorrampage   7640   13 Replies

avg1000

How would you design a controlled experiment to measure the effect of falling leaves on net primary

How would you design a controlled experiment to measure the effect of falling leaves on net primary

With two nearby ponds in a forest as the study site, how would you design a controlled experiment to measure the effect of falling leaves on net primary production in a pond?

peachesPK   7655   1 Reply

bio_man

The sperm chromosome maps are more likely to be DeP than DEP. Explain.

The sperm chromosome maps are more likely to be DeP than DEP. Explain.

11) The sperm chromosome maps are more likely to be DeP than DEP. Explain. (Thumbnail #1)

Hint - Again the location of the alleles on the chromosome is important. The farther apart, and the greater the distance from the centromere, then th

ZOË95   7767   12 Replies

bio_man

Six different one-drop samples in a Paramecium sp. population had the following

Six different one-drop samples in a Paramecium sp. population had the following

Six different one-drop samples in a Paramecium sp. population had the following numbers of organisms: 4, 6, 5, 3, 6, and 6. If 20 drops represent 1 mL of solution, and the volume of the solution is 40 mL, calculate the size of the population.

12

fosmanali01   7778   14 Replies

Zlovespigs

Conscious efforts to control body responses through biofeedback originate in the

Conscious efforts to control body responses through biofeedback originate in the

biofeedback consists of conscious efforts to control body responses that are normally involuntary. Some individuals have used this technique to lower their breathing rate and heart trate. Conscious efforts to control body responses through biofeedbac

BIOLOGY FREAK   7796   3 Replies

bio_man

If a roan shorthorn is crossed with a white-coated shorthorn, what is the probab

If a roan shorthorn is crossed with a white-coated shorthorn, what is the probab

If a roan shorthorn is crossed with a white-coated shorthorn, what is the probability that the offspring will be a roan shorthorn?
So we're supposed to record it from 0-1, rounded.
It's worth noting from the previous question tha

1qqza   7817   9 Replies

Makenzie Kuziw

allele frequency of a population

allele frequency of a population

In a randomly mating population of mice, 25.0 out of every 100.0 mice born have white fur, a recessive trait.
     (a) Calculate the frequency of each allele in the population.
     (b) Calculate the genotype frequencie

lindsaym   7938   3 Replies

lindsaym

The adrenal medulla is considered a neuroendocrine structure because

The adrenal medulla is considered a neuroendocrine structure because

The adrenal medulla is considered a neuroendocrine structure because
A. neuronsfrom the medulla oblongata are embedded in the adrenal medulla for regulation of its secretions
B. it impacts heart contractions resulting in increased volume an

BIOLOGY FREAK   7950   8 Replies

biologyfreak2

A 0.600 m long pendulum is used to determine the acceleration due to gravity on

A 0.600 m long pendulum is used to determine the acceleration due to gravity on

A 0.600 m long pendulum is used to determine the acceleration due to gravity on a distant planet.  If 20 complete oscillations are completed in 35.5 s, the acceleration would be...

biochicka   7981   2 Replies

biochicka

Who is the father? (Blood Types)

Who is the father? (Blood Types)

I have no idea what to on this question, and it's the last one I have to do. It's worth 7 points.


As a lawyer, you have some experience in paternity suits. You are required to provide technical information to a jury in a mo

Brayden   7991   4 Replies

manbearpig

Match the hormone secreted with the correct function.

Match the hormone secreted with the correct function.

   
insulin

   
parathyroid hormone

   
hGH

   
secretin

   
calcitonin

   
thyroxine

   
aldosterone

   
estrogen

   
gastrin

KONJO369   8100   6 Replies

fdgyskauf

What are some examples of homeostasis in The Princess Bride?

What are some examples of homeostasis in The Princess Bride?

We watched The Princess Bride in class and are supposed to write an essay on how it relates to homeostasis. I found one example of Fezzik the giant who has the growth hormone. I also used Vizzini, the short guy, as another example. I needed a few mor

Chuckie   8185   N/A

Chuckie

where do fatty acids enter the aerobic respiration pathway?

where do fatty acids enter the aerobic respiration pathway?

and what is the role of NAD+ in glycolysis?

jenlu   8204   5 Replies

duddy

What variation exists in the peppered moth population? Is one of these variations considered an adap

What variation exists in the peppered moth population? Is one of these variations considered an adap

What variation exists in the peppered moth population? Is one of these variations considered an adaptation? Explain.


Over 200 years ago, all of the peppered moths in a certain population were light-coloured. How could the first dark-

ghosthunter   8243   5 Replies

Massimo Chen