Correct Answer: C. Red blood cells

Explanation

Red blood cells, also known as erythrocytes, are responsible for carrying oxygen to the body tissues. They contain a protein called hemoglobin, which binds to oxygen in the lungs and transports it to other parts of the body.

Correct Answer: D. Channelling sewage into streams

Correct Answer: A. Plants can photosynthesize without an increase in dry weight

Correct Answer: A. forage crops

Correct Answer: A) Cones

Explanation

In Biology, plants are classified into different groups based on their characteristics. One way plants can be classified is based on how they produce seeds. There are two major groups of seed-producing plants: angiosperms and gymnosperms. The question is asking about a difference between these two groups of plants. Angiosperms are plants that produce flowers, fruits, and seeds that are enclosed within an ovary. Gymnosperms, on the other hand, produce seeds that are not enclosed within an ovary or fruit. The question is asking to identify where seeds are borne in Gymnosperms. The correct answer is option A, cones. Gymnosperms produce cones, which contain the seeds. These cones can be found on the branches of the tree and are usually woody in texture. This is a major difference between Angiosperms and Gymnosperms. Angiosperms produce fruits that contain the seeds, while Gymnosperms produce cones that contain the seeds. It's important to note that both Angiosperms and Gymnosperms are important for the ecosystem and have different adaptations that help them survive in their respective habitats. In summary, the major difference between an Angiosperm and a Gymnosperm is the way they produce seeds. Angiosperms produce fruits that contain the seeds, while Gymnosperms produce cones that contain the seeds. The correct answer to the question is option A, cones.

Correct Answer: C. stop the action of ptyalin

Correct Answer: A. Fishes, amphibians, birds, man.

Explanation

(a)(1)Trait: Characteristic of an organism controlled by pairs of genes.

(ii)Recessive gene: Member of a pair of genes in a genotype, whose characteristics are not manifest in the phenotype / in the presence of its contrasting gene / allele

(iii)Test cross: Mating / exposing of the heterozygous individual of Fl generation, to homozygous recessive parents

(iv)Heterozygous: This refers to the genotype, consisting of two different / contrasting genes / alleles

Blood group of Blood Blood Blood Blood

Offspring Group A Group B Group A Group A

No, the man cannot be-the father of the child.

(c)(i) Test cross: The male rabbit (Brown) is mated with a homozygous white female rabbit, having the recessive trait, f the male is homozygous all the offspring will be brown, if the male is heterozygous half of the offspring will be brown and half white.

(ii) Gamete and somatic chromosome number: The gametes contain half the number of chromosomes / n / haploid number of chromosomes, found in the body / somatic diploid / 2n cell.

Correct Answer: A. maintain soil fertility

Correct Answer: B. Muscular Activity