"These" should be referring to Alkali Metals.
They include metals such as Lithium, Sodium, Potassium etc.
They're classified as Group I elements because they all have one outmost shell electrons. This is why these metals are so reactive because they only need to lose one electron in order to achieve the octet of electrons (or duplet for Lithium), which means complete outmost shell electrons (2 or the 1st shell, others are 8).
The reason why they're especially reactive to Halogens (Group VII) elements are that Halogens have 7 outmost shell electrons, which only needs one more electron in order to get to the octet of electrons. So, if an Alkali metal reacts with a Halogen, the metal would give one of their electrons to the Halogen, that way, both of the elements can have an octet of electrons (or duplet).
I would say A just because if your dad has a genetic disease and you mom does not have it you have about a 50 50 chance of having that disease in a perfect control that's assuming that its recessive and that your moms side does not present this disease
that's how its always been taught to me
The ratio of yellow seed phenotype with green seed color seed offsprings will be 4:0.
Explanation:
Given that:
Dominant trait is Y (yellow seed color)
recessive trait is y (green seeds color)
cross between YY and yy, According Mendelian Genetics dominant trait will be seen in phenotype as it masks the effect of recessive gene.
Punnet square shows that:
Y Y
y Yy Yy
y Yy Yy
All the plants produced will be tall phenotype.
The yellow seed plant plants will be heterozygous i.e Yy
the phenotype ratio is 4:0
The genotype ratio is 4:0
The genotype of the offspring is Yy
phenotype is yellow colored seed plant.
Answer:
The correct answer is - C. It is composed of different kinds of tissues.
Explanation:
An organ is a part of the body that is composed of different types of tissues that form a structure and vascularisation, and capable of the development of a physiological function.
The mesentery is a structure that connects the loops of the small intestine which is made up of the different types of tissue to perform a various functions and is not a part of a particular organ system.
The immediate intervention for
this client is to let her limit the number she washes her hands a number of
times. The advice is not to illuminate but reduce so that the client still cope
with the feeling of anxiety while aiming why handwashing is not necessary. Also
there is a need of washing the hands for instance after toileting.