Correct Answer: C. Robert Hooke

Correct Answer: D) endosperm

Explanation

In maize grain, there is a structure that stores food. The question is asking which structure performs this function. The options are radicle, embryo, cytoplasm, and endosperm. Radicle is the embryonic root of the plant, while embryo is the young developing plant enclosed in the seed. Cytoplasm is the fluid inside the cell membrane that contains organelles and other components. The correct answer to this question is option D, endosperm. The endosperm is a tissue that is formed inside the seed after fertilization. Its main function is to provide nutrition to the developing embryo. In maize, the endosperm is the largest structure in the seed and is the primary storage tissue for food reserves such as starch and proteins. Understanding the different structures and their functions in the seed is important in the study of plant growth and development. For more information, please see the recommended textbooks.

Correct Answer: C. blood corpuscles

Explanation

Glomerular filtration is the first step in making urine. It is the process that your kidneys use to filter excess fluid and waste products out of the blood.

Glomerular filtrate contains a lot of water, but also important molecules like glucose, amino acids, salts and excretory material, urea.

Correct Answer: A. anabaena

Correct Answer: D. Femur

Correct Answer: B) chromosome number of cells is halved

Explanation

Meiosis is a type of cell division that occurs in sexually reproducing organisms. This process is important because it ensures that the offspring produced have a combination of genetic information from both parents. In the given Biology question, we are asked to identify what meiotic cell division ensures. Option A states that many similar cells are produced, but this is incorrect. Meiosis actually produces cells that are different from each other, due to the process of crossing over and independent assortment of chromosomes. Option B is the correct answer. Meiotic cell division ensures that the chromosome number of cells is halved. This is important because the resulting cells, called gametes, will combine during fertilization to form a zygote with a full set of chromosomes. Without meiosis, the offspring would have double the number of chromosomes as their parents. Option C states that cells produced are doubled, but this is incorrect. Meiosis actually reduces the number of cells by half, resulting in four haploid cells. Option D states that cells produced possess the same chromosome number, but this is also incorrect. Meiosis ensures that each resulting cell has a unique combination of genetic information due to crossing over and independent assortment of chromosomes. In summary, meiotic cell division ensures that the chromosome number of cells is halved. This is important for sexual reproduction because it allows for genetic diversity in offspring.

Correct Answer: B. tactic movement

Correct Answer: A. Thoracic

Correct Answer: A. 5' - TAGCTTCACG - 3'

Explanation

The question specifies that this is DNA replication. U (uracil) is found only in RNA and T (thymine) is found only in DNA. In DNA, A (adenine) pairs with T (thymine) and G (guanine) pairs with C (cytosine) so the complementary strand will have A where the original has T, G where the original has C, C where the original has G and T where the original has A. DNA strands run antiparallel, so the 3' end on the new strand will go opposite the 5' end on the original and vice versa. In this case, that means the complementary strand will run from 5' to 3' to read 5' - TAGCTTCACG - 3'. This sequence is shown in bold below:

Correct Answer: B. Photosynthesis