Answer:
A heart attack occurs when the flow of blood that carries oxygen to the heart is blocked. The myocardium is deprived of oxygen and begins to die.
A person who has a heart attack may have some of these symptoms, or all of them:
Uncomfortable pressure, inflammation or oppressive pain in the center of the chest
Discomfort or pain that spreads beyond the chest to the shoulders, back, neck, jaw, teeth, one or both arms, and sometimes the upper abdomen
Shortness of breath
Stun, dizziness and fainting
Sweating
Sickness
Usually, a heart attack causes chest pain for more than 15 minutes, but it also may not show any symptoms. It is important to know that other symptoms may occur in addition to chest pain, such as indigestion or persistent pain in the neck or jaw.
Many people who have a heart attack have warning signs in advance of hours, days or weeks.
Blank 1: <u>hawks and owls</u>
Explanation: Tertiary consumers lie on the top of the food web or pyramid. They are dependent on other organisms for their food. These are carnivores by mode of nutrition. Here, the food web sequence would be like-
small birds----->snakes----->hawks and owls.
That's why they are the tertiary consumers.
Blank 2: <u>decomposers
</u>
Explanation: The organic matter of dead plants and animals is decomposed by decomposers. They breakdown the complex organic compounds into simpler substances.
Answer:
Fertilised ovum from sheep + cell in sheep's mammary gland isolation
Diploid one cell isolated + nucleus from ovum
Nucleus inserted into empty ovum
Ovum implanted in uterus of unrelated sheep
Ovum develops into foetus
Explanation:
In this process a nucleus from a fertilised ovum was removed and replaced with a diploid nucleus of a cell from the mammary glands of another sheep. The ovum was implanted into the sheep's uterus. The resulting foetus "Dolly" born similar to donor sheep.
Answer:
Cow
noun
(properly) An adult female of the species Bos taurus that has calved.
Pig
noun
Any of several intelligent mammalian species of the genus Sus, having cloven hooves, bristles and a nose adapted for digging; especially the domesticated animal Sus scrofa.
‘The man kept a pen with two pigs that he fed from carrots to cabbage.’;
Cow
noun
(formerly inexact but now common) Any member of the species Bos taurus regardless of sex or age, including bulls and calves.
Pig
noun
(specifically) A young swine, a piglet contrasted with a hog, an adult swine.
Cow
noun
(uncommon) Beef: the meat of cattle as from eating pig
Answer:
Dominant
Explanation:
Let the allele for short tail trait be represented by "T" and allele for long tail trait be represented by "t"
When a short tailed mutant with genotype "tt" is mated with long tailed mouse, following offspring will be produced -
Tt * tt
Tt, Tt, tt, tt
so the ratio of short tailed and long tailed mouse is 1:1
Here it is given as 4:3 . Hence, there are chances that short tail trait is dominant
In the second generation , two short tailed mouse are crossed. The following offspring will be produced
Tt * Tt
TT, Tt, Tt, tt
The ration of short tailed and long tailed mouse is 3:1
Here it is given as 6:3 i.e 2:1 . Hence, short tail trait is dominant over long tail trait.