The primary function of major organs shown in the figure include;
1. Sporangia; its functions is to produce spore structures which are aggregated to bigger structures.
2. Rhizoids; are structures which are being projected from prothallium and its function is anchoring structures.
3. Prothallus; is the gametophyte and its functions are the carrier of both female and male sex organs.
4. Antheridium; it is the female sex organ and its functions are to produce eggs.
Answer:
1,2 × 10⁹ : 1
Explanation:
In fact, the average male will produce roughly 525 billion sperm cells over a lifetime and shed at least one billion of them per month. A healthy adult male can release between 40 million and 1.2 billion sperm cells in a single ejaculation.
The correct answer is: a. n+1, n+1, n-1, n-1
Nondisjunction is the failure of homologous chromosomes or sister chromatids to separate properly during mitosis or meiosis. There are three forms of nondisjunction:
1. failure of a pair of homologous chromosomes to separate in meiosis I ,
2. failure of sister chromatids to separate during meiosis II, and
3. failure of sister chromatids to separate during mitosis.
As a consequence of nondisjunction abnormal chromosome numbers appears. If nondisjunction occurs during the meiosis I (anaphase I), this means that at least one pair of homologous chromosomes did not separate. The consequence is two cells that have an extra copy of one chromosome and two cells that lack that chromosome.
<h2>Which of the following animals are insects?</h2>
cricket - insect
honeybee - insect
ladybug - insect
wolf spider - insect
catfish - not insect
These are insects and the one here is not because it is fish and not insects
Both fungi and bacteria are very important for decomposition of organic matter. Decomposition is the break down of dead or decaying organisms. This allows nutrients from all trophic levels to re-enter the soil to be used by primary producers. Fungi are more effective decomposers compared to bacteria as they can <span>use their hyphae to penetrate larger pieces of organic matter, whereas bacteria are restricted to exposed surfaces. </span>
