Wednesday, 13 May 2015

Forensic Entomology - Insects solving crimes

Fresh Fly

1.What is the main food source for the insect?
Ans.Fruit fly larvae are possible prey of ants staphylinid beetles. Chickens and other fowl may eat fruit fly larvae present on overripe fruits and vegetables and sometimes consume fly pupae found beneath trees. Other common larval and pupal fruit fly predators include predaceous wasps wasps, mites and crickets 

2. How does it help determine the time of death at a crime scene?
Ans. When a suspicious death occurs, a forensic entomologist may be called to assist in processing the crime scene. Insects found on or near the body may reveal important clues about the crime, including the victim's time to death.

3.What is the time length and description of it's life cycle?
Ans. Fruit files undergo three stages of development before emerging as adults: egg, larva and pupa. At room temperature, fruit flies can develop into adults within one to two weeks. The egg and larval stages span approximately eight days, while the pupal stage lasts six days. The adult fruit flies lives for several errks. 

4. Describe what the insect looks like and post a picture of it.
Ans. It's look like exactly honey bee but thios fruit fly could cause a human very easily with dangerous poison.

House Fly

1. .What is the main food source for the insect?
Ans. The main food source of houseflies are milk, sugar, blood, feces, and decaying organic matter such as fruits and vegetables. Houseflies also require a source of water. Larvae also eat paper and textile materials such as wool, cotton and sacing if it is kept moist and at suitable temperatures.

2. How does it help determine the time of death at a crime scene?
Ans. Entomology is the study of insects, and forensic entomologists use insects to provide information about crimes.

3.What is the time length and description of it's life cycle?
Ans. With a day housefly eggs hatch into larvae,also known as maggots. Maggotos are legless white insects that feed from the egg laying site for three to five days


4.Describe what the insect looks like and post a picture of it.
Ans. This looks like a bee. This insect could kill other insects very easily





Monday, 4 May 2015

DNA structure colouring questions !


1. What are the 3 parts of a nucleotide ?
Ans. 1) a five carbon ribose sugar,
 2) a phosphate molecule and 
3) one of four nitrogenous bases: adenine, guanine, cytosine or uracil.

2. What 4 bases are found in DNA?
Ans.  adenine (abbreviated A), cytosine (C), guanine (G) and thymine (T)

3. What 2 molecules make the sides of the DNA ladder?
Ans. It has an alternating chemical phosphate and sugar backbone, making the 'sides' of the ladder. (Deoxyribose is the name of the sugar found in the backbone of DNA.)

4. What molecules make the steps or rings of the ladder ?
Ans. Nitrogenous Bases: HydrogenBonding, Lesson & Quiz. Adenine, cytosine, thymine, guanine, and uracil! They are the 'rungs' in the DNA ladder. Learn how these ring-shaped molecules spell out your genes and pair with each other.

5. Which molecules do the bases attach to on the sides 
Ans.(Deoxyribose is the name of the sugar found in the backbone of DNA.

6. Which bases always pair together ?
Ans.Adenine pairs with thymine and guanine pairs with cytosine.