Answer;
D. redwood tree forests.
Explanations;
Gymnosperms are seed-bearing vascular plants including, conifers, cycads, ginkgo, in which the ovules or seeds are not enclosed in an ovary.
In gymnosperms the cone is the female reproductive part and the pollen is the male reproductive part.
Red wood trees are examples of gymnosperms and are important in maintaining the balance of carbon dioxide in the atmosphere like other green plants.
Answer:
motor neurons
Explanation:
muscles contraction begins when the nervous system generates a signal.The signal, an impulse called action potential, travels through a type of nerve cell called motor neuron. The neuromuscular junction is the place where the motor neuron reaches a muscle cell.
Answer:
Homologous chromosomes are separated from each other.
Explanation:
In meiosis I during metaphase, all the homologous chromosomes of the cell pair up and get arranged near equatorial plate. Subsequently after completion of meiosis I, these homologous chromosomes get separated from each other so that out of the two cells which are produced after meiosis I could get one chromosome each from the homologous pair. During anaphase I of meiosis I, spindle fibres are formed which drag each of these homologous chromosomes towards two opposite poles. Soon after that, cytokinesis occurs during telophase I of meiosis I leading to the generation of two cells.
For example, humans have 46 chromosomes or 23 pairs of homologous chromosomes. After completion of meiosis I, two cells are produced and each one of them has 23 chromosomes.
Magnesium is the major mineral which is important for nerve and heart functions. It is a co-factor for over 300 enzymes. It is a major constituent of bone and is found in whole grains and vegetables. Sudden heart attacks may be due to the low level of magnesium. It can be obtained by consuming rice bran, sunflower seed, wheat barn and linseed meal.
<span>The composite mesoglea of jellyfish and sea anemones provides structural support using collagen fibers in a complex gel matrix.</span>
