Ask Question, Ask an Expert

+1-415-315-9853

info@mywordsolution.com

Ask Biology Expert

problem 1) List three human activities which could cause the loss of a species.

problem 2) Distinguish between the terms 'pesticide', 'insecticide' and 'herbicide.

problem 3)(a) What is the special property of a 'persistent' insecticide?

(b) In what ways is 'persistence’ (i) a useful property, (ii) a harmful property?

problem 4) Put the following events in the most probable order.

(a) Predatory birds poisoned by insecticide.
(b) Trees sprayed with insecticide.
(c) Earthworms eat leaves which fall from trees.
(d) Predatory birds eat small birds.
(e) Beetles damage trees by spreading a virus.
(f) Insecticide absorbed by tree leaves.
(g) Small birds eat earthworms.

problem 5) Put the following events in the most probable order.

(a) Dead algae decomposed by bacteria.       
(b) Bacteria use up oxygen.   
(c) Excess nitrate and phosphate.                  
(d) Aquatic algae die.
(e) discharged into river.                               
(f) Water depleted of oxygen.
(g) Aquatic algae grow rapidly.
(h) Fish die of suffocation.                             

problem 6) What are the principal sources of excessive nitrate and phosphate in rivers and lakes?

problem 7) List the short-term and long-term effects of forest destruction  (a) on hillsides, (b) in the tropics. 

problem 8) In what ways does over-grazing lead to soil erosion?

problem 9) Which of the following are likely to help conserve soil and prevent erosion?

(a) Ploughing slopes.                           (f) Removing trees from hillsides.
(b) Planting trees on steep slopes.       (g) Growing the same crops each year.
(c) Using chemical fertilisers.                (h) Keeping as many animals as possible on grassland.      
(d) Terracing hillsides.                          (e) Using organic manure.

problem 10)(a) What are the two main pollutants that contribute to acid rain?

(b) Where do these pollutants come from?

(c) What direct or indirect effect is 'acid rain' thought to have on

(i) lakes,

(ii) forests and

(iii) buildings?

Biology, Academics

  • Category:- Biology
  • Reference No.:- M95209

Have any Question? 


Related Questions in Biology

Evolutionary biology in the age of genomics- q1

Evolutionary Biology in the age of Genomics- Q1. Phylogenetic trees- You are analyzing sequences sampled from four turtle species (A-D), considering a genomic region that is 75 base pairs long. You observe the following ...

1 from the figure below what does 55 and 45 of the blood

1. From the figure below, what does 55% and 45% of the blood cells respectively constitute of? 1) RBCs and Plasma, Platelets, Lymphocytes 2) Platelets and Lymphocytes, Plasma, RBCs 3) Plasma and RBCs, Platelets, Lymphocy ...

Cell biologyimagine that you are asked to tutor another

Cell Biology Imagine that you are asked to tutor another student on the fundamental concepts of chemistry, the scientific method, and the differences between a plant cell, an animal cell, and a bacterial cell. Create a 1 ...

Depletion of nadph and glutathione in cells is considered

Depletion of NADPH and glutathione in cells is considered harmful. Explain why, and give an example of a chemical that may deplete NADPH and glutathione through interaction with the FMO enzyme. The FMO3 enzyme has an imp ...

Biological system is amazing a fellow student claims it can

"Biological system is amazing", a fellow student claims, "it can drive any thermodynamically unfavorable reaction forward, and does not need to follow the thermodynamic laws." How would you respond to this statement? Giv ...

Biologyeukaryotic and prokaryotic cells can be compared to

Biology Eukaryotic and prokaryotic cells can be compared to mini-factories, with multiple organelles working together to perform numerous cellular processes. After reviewing the parts of a eukaryotic or prokaryotic cell: ...

Posted in description areaquestions 1response should be at

Posted in Description Area Questions 1 Response should be at least 200 words in length. All sources used, including the textbook, must be referenced; paraphrased and quoted material must have accompanying in-text citatio ...

Based on your experience if you had to design a cell with a

Based on your experience, if you had to design a cell with a volume of 125 cm3, explain the best dimensions of the cell for the most efficient rate of diffusion? Hint: it may not be a perfect cube.

1 identify list the two basic types of cells2 would you

1. Identify (list) the two basic types of cells. 2. Would you find proteins inside cells or cells inside proteins? (choose one answer) 3. What two things make osmosis a special type of diffusion? 4. What is a selectively ...

Human biology1where does lymph come from2list the primary

Human Biology 1. Where does lymph come from? 2. List the primary lymphatic organs. List the secondary lymphatic organs. 3. What structures allow the lymph to enter the cardiovascular system? 4. Why is the thymus so criti ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

A cola-dispensing machine is set to dispense 9 ounces of

A cola-dispensing machine is set to dispense 9 ounces of cola per cup, with a standard deviation of 1.0 ounce. The manuf

What is marketingbullwhat is marketing think back to your

What is Marketing? • "What is marketing"? Think back to your impressions before you started this class versus how you

Question -your client david smith runs a small it

QUESTION - Your client, David Smith runs a small IT consulting business specialising in computer software and techno

Inspection of a random sample of 22 aircraft showed that 15

Inspection of a random sample of 22 aircraft showed that 15 needed repairs to fix a wiring problem that might compromise

Effective hrmquestionhow can an effective hrm system help

Effective HRM Question How can an effective HRM system help facilitate the achievement of an organization's strate