Answer:
Crossing over occurs during prophase I of meiosis before tetrads are aligned along the equator in metaphase I.
Explanation:
When chromatids "cross over," homologous chromosomes trade pieces of genetic material, resulting in novel combinations of alleles, though the same genes are still present. Crossing over occurs during prophase I of meiosis before tetrads are aligned along the equator in metaphase I.
Answer:
D. reproduction
Explanation:
If the species doesn't reproduce they die out or become extinct.
Water, gravity, and light.
The population age structure is is simply the structure of a population in a given time period by age groups. In order to represent the population age structure in a simple and efficient way, the population pyramid is used. Depending of what type of population is dominant, the pyramid will have different shapes. It can easily show us the trends and type of demographic transition for a particular population. When there high birthrates, the pyramid tends to be widest at the bottom, but when there's low birthrates the pyramid tends to be widening in the middle and upper sections.
Observe wild dolphins, porpoises, and seals from safe distances of at least 50 <span>yards. You could u</span><span>se binoculars or telephoto lenses for a better view of the animals, l</span><span>imit overall viewing time to no more than 30 minutes. </span><span>Avoid circling or entrapping marine mammals between watercraft, or watercraft </span>
<span>and shore , a</span><span>void abrupt movements or loud noises around marine mammals . You need to try and AVOID</span><span> separating mother/calf pairs and m</span><span>ove away cautiously if behaviors are observed that indicate the animal is </span>
<span>stressed. You can also try to avoid them even if they do come to you. it's more than three, but there ya go :)</span>
