Mutations may be silent, meaning they don't affect an organism, but are still there. Also, some mutations occur in somatic cells and therefore can't be passed on to species, which means they won't affect evolution.
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The answer is <span>A. Dermal tissue, ground tissue, and vascular tissue respectively.
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</em>1. <em>Epidermis is dermal tissue. </em>Dermal tissue covers the plant from the outside. It consists of epidermis and periderm. Epidermis is a single layer that covers young plants.
2. <em>Sclerenchyma is ground tissue.</em> Ground tissue has a variety of functions. It consists of sclerenchyma and parenchyma. The function of sclerenchima is support and strength of roots, stems, and leaves.
3. <em>Phloem is vascular tissue.</em> Vascular tissue has a role in transport of minerals, water, and organic compounds. It consists of phloem and xylem. Phloem transport organic compounds, such as carbohydrates, hormones, etc.
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Explanation:
<em>The disadvantage of a closed circulatory system is that with the blood always contained in vessels, it's under higher pressure. This means it can flow faster, which is necessary for supporting the metabolic rate of more complex animals such as vertebrates. Open circulatory systems are low-pressure systems that cannot meet the needs of a fast metabolism</em>.
Answer:
a) HT
Explanation:
This question shows an animal with two distinct unlinked genes i.e. on different chromosomes. One gene codes for head shape and the other for tail length. The gene for head shape possess alleles H and h, while gene for tail length possess alleles T and t.
According to Mendel's law of independent assortment, the alleles of a gene will separate into gametes independently of the alleles of another gene. This occurs in such a way that each gamete will contain only one allele from a gene.
Based on this principle, an animal with genotype HhTt will undergo meiosis and randomly produce gametes with the following allelic combinations: HT, Ht, hT, and ht. As seen in the gametes, only one allele of a gene occured in a gamete at a time.
Therefore, HT is the genotype possible in a gamete of parent: HhTt.
