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Biology in Human Welfare

Vaccines produced by genetic engineering is :

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Vaccines produced by genetic engineering is :

Hepatitis B
Herpes virus
Malarial vaccines
Both (a) and (b).

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Practice more questions on Biology in Human Welfare

Question 1

Medium

From among the situations given below, choose the one that prevents both autogamy and geitonogamy.

Monoecious plant bearing unisexual flowers
Dioecious plant bearing only male or female flowers
Monoecious plant with bisexual flowers
Dioecious plant with bisexual flowers

Topic:

Sexual Reproduction in Flowering Plants

Book:

CBSE New Pattern Biology Class 12 for 2021-22 Exam MCQs based book for Term 1

View 4 solutions

Question 2

Medium

Which one of the following is the most likely root cause why menstruation is not taking place in regularly cycling human female?

maintenance of the hypertrophical endometrial lining
maintenance of high concentration of sex-hormones in the blood stream
retention of well-developed corpus luteum
fertilisation of the ovum

Topic:

Human Reproduction

Book:

Dr. Ali Objective Biology

View 5 solutions

Question 3

Medium

Infertility could develop when the sperm cells display

A count of 120 million/mL semen
Increased acrosomal activity
Normal morphology
Count of less than 20 million/mL semen

Topic:

Human Reproduction

View solution

Question 4

Easy

Development of embry from the cells of the nucellus is called:

Parthenocarps
Apocarpy
Adventive embryony
Apospory

Topic:

Reproduction in Organisms

Book:

Precalculus

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Students who ask this question also asked

Question 1

- In the pea plant, contrasting characters can Phenotype : The external apperance of an be easily recognized. individual for any trait is called phenotype for - The seven different charaters in pea that trait. It is observable and is determined by plant were controlled by a single factor different combinations of alleles. e.g. In pea, each. The factors are located on separate for the height of stem (plant) tall and dwarf are chromosomes and these factors are the two phenotypes (Tall is determined by TT transmitted from generation to generation. or Tt and dwarf by

tt

- He introduced the concepts of dominance Genotype : Genetic constitution or genetic and recessiveness. make up of an organism with respect to a Before learning about Mendel's particular trait. It is representation of the genetic experiments let us get acquainted with genetic constitution of an individual with respect to terms and symbols. a single character or a set of characters. e.g.
3.2 Genetic Terminology : pea tall plants can have genotype TT or Tt and
Character : It is a specific feature of an dwarf has $tt$ . organism e.g. height of stem. Homozygous (pure): An individual possessing Trait : An inherited character and its detectable identical allels for a particular trait, is called $variant e.g. Tall or dwarf. Factor : It is a unit of heredity, a particle homozygous or pure for that trait. Homozygous breeds true to the trait and$ Factor : It is a unit of heredity, a particle produces only one type of gametes e.g., tall present in the organism which is responsible for the inheritance and expression of a character. with TT and dwarf with tt. (factor is passed from one generation to the Heterozygous : An individual possessing next through gametes). Factor determines a contrasting alleles for a particular trait, is genetical (biological) character of an organism. called heterozygous. Heterozygous does not Gene: It is a particular segment of DNA which breed true for that trait and produces two types is responsible for the inheritance and expression of gametes e.g. $F_{!}$ generation hybrids (Tt). $of that character. Pure line : An individual or a group of Heterozygous individual is also called hybrid.$ Alleles or Allelomorphs : The two or more Pure line : An individual or a group of alternative forms of a given gene (factor) or true breeding for one or more traits, are called alleles of each other. They occupy constitutes pure line i.e. plant which breeds true identical loci (positions) on homologous for a particular character. It is a descendent of chromosomes. Allele is a short form of a single homozygous parent produced after self Allelomorph.
Dominant : It is an allele that expresses its trait fertilization. Monohybrid : It is heterozygous for one trait even in the presence of an alternative allele i.e. and is produced from a cross between two pure in heterozygous condition only. Alternatively, parents differing in single pair of contrasting the allele that expresses in $F_{1}$ is called paracters e.g. Hybrid tall produced in a cross the expression of other allele in $F$ , generation.) between pure tall and pure dwarf parents. It is a Recessive : This allele is not expressed heterozygote for a single pair of alleles. in the presence of an alternative allele (in $F_{1}$ generation : It refers to the first filial heterozygous condition). It expresses only in generation. It consists of all off-springs the presence of another identical allele. It is an produced from a parental cross. Alternatively, it allele that does not express in $F$ , hybrid. is first generation from given mating between pure parents having contrasting characters.

Topic:

Biology in Human Welfare

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Question 2

26: An unknown liquid collected from a sample of peas, is added to a beaker of water and is vigorously shaken. two separate lavers. To which class of biomolecules, does the unknown liquid most likely belongs?

Polysaccharides
Proteins
Lipids
Enzymes

Topic:

Biology in Human Welfare

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Question 3

21. Explain urechanisun of hormone action

{"22. why are Paveraos calbd a composite gland?","- 23. what rala does adrang gands play in kidray?","24, Explain role of Pitintary gland in our body.","t25. What ar the function of tubules in the nephrom."}

Topic:

Biology in Human Welfare

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Question 4

3.5 DRUGS AND ALCOHOL ABUSE furveys and statistics show that use of ae rise especially among the youth. This

Topic:

Biology in Human Welfare

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