Answer: f. only b. and c. are examples of homozygotes
Explanation:
Diploid cells (all non-reproductive cells) have two copies of each gene, called <em>alleles</em>, one obtained from the father and one from the mother. In genetics, an organism is a homozygote for a gene if both alleles are the same. In contrast, heterozygotes have different alleles for the same gen.
Genes are represented with a letter, and you can differentiate between <em>alleles </em>if the letter is uppercase or lowercase.
For example, if you wanted to represent the gene that encodes a flower color, you could call A the 'red' version of it and a the 'blue' version of it. A plant would be homozygote for that gen if it had the same version for both alleles, AA or aa.
Answer:
We get oxygen from the air i.e. atmosphere. Green plants release oxygen in the atmosphere as a byproduct of photosynthesis. Respiratory system is responsible for obtaining oxygen from the environment. Circulatory system on other hand helps in delivering this oxygen to different cells of the body with the help of blood.
We get nutrients from the food that we eat. Digestive system breaks down all the complex compounds (such as polysaccharides, polypeptides, fats etc) into simpler elements which are easy to absorb.
produced as a waste product by the cells is carried by the blood to alveoli in the lungs where it gets diffused out and come out of the body as a part of exhale air. Hence, circulatory system helps in he transportation of from cells to the lungs and respiratory system helps in expelling it out from the lungs to the outside environment.
Solid wastes are mainly excreted out of the body from anus which is a part of digestive system. On the other hand, liquid waste (urine) is excreted out of the body with the help of urethra which is the part of excretory system. In addition, excess salts and water can also excrete out of the body through skin.
Muscles and bones together help us in our locomotion. Nervous system is important for proper functioning of bones and muscles.
Meiosis is the type of cell division used to produce haploid cells or gametes from a diploid parent cell. Hence, it is used in reproduction system to produce sperm in males and eggs in females.
Answer:
Question is incomplete.
the full question is as follow
In the three-domain model, the bacterial ancestor of mitochondria derives from ancient ________, where as chloroplasts derive from ancient _____.
Explanation:
A review article is published in journal of cell science in 2016, in which they reveled the bacterial hierarchy how bacteria came into existence. According to this paper and its references In the three-domain model, the bacterial ancestor of mitochondria derives from ancient ___proteobacteria___, where as chloroplasts derive from ancient ___cyanobacteria___.
Reference: Dacks, Joel B., et al. "The changing view of eukaryogenesis–fossils, cells, lineages and how they all come together." J Cell Sci 129.20 (2016): 3695-3703.
Answer:
Add some iodine to a beaker containing the sample. If starch is present, the colour of the solution will turn blue-black.
Explanation: