Answer;
-Pellicle
Explanation;
-Protist cells may contain a single nucleus or many nuclei; they range in size from microscopic to thousands of meters in area. Protists may have animal-like cell membranes, plant-like cell walls, or may be covered by a pellicle.
-On a paramecium's exterior is found the pellicle. The pellicle is stiff to maintain the paramecium's shape and provide stability but it is also flexible to allow movement. It also acts as an attachment site for external organelles such as cilia.
Answer:
A. True
Explanation:
The renin-angiotensin-aldosterone system <u>stabilizes blood pressure and volume</u>. The system constricts arteries and increases the amount of blood that the heart pumps, as well as the reabsorption of sodium (Na+) by the nephrons. Also, it decreases the glomerular filtration rate. All this increases blood volume and pressure.
On the other hand, ANP decreases blood volume and pressure by increasing the glomerular filtration rate and decreasing reabsorption of sodium by nephrons. Finally, this hormone inhibits the release of renin, aldosterone, and ADH.
Answer:
The planting method using transplants allows the selection of vigorous and healthy seedlings, which enables the production of uniform bulbs which can mean harvesting garden edibles sooner.
The expenditure on seeds is lower, the consumption of irrigation water during the period of seedling formation is reduced and the management of fertilization, weeds and diseases and pests is facilitated in comparison with direct sowing. On the other hand, this method requires a lot of labor.
Explanation:
1. Genes are versions of alleles.
2. For each trait, an organism inherits two alleles.
3. The dominant allele determines the phenotype of an organism.
4. Allele pairs separate during the production of gametes so there is only one allele.
Advantages : can kill unwanted insects , msg affect the food chain
disadvantages: can kill the organisms that are not needed and cause issues among crops
