Answer:
A mouth
Explanation:
The answer is that cnidarians lack triploblastic development. Cnidarians, such as jellyfish, sea anemone, and hydra, exhibit diploblastic development. This means that they have only two germ layers: the ectoderm and the endoderm. To understand triploblastic development, let's break it down. Triploblastic development refers to the formation of three germ layers: the ectoderm, the mesoderm, and the endoderm. These germ layers give rise to different tissues and organs in the body. In contrast, cnidarians lack the mesoderm layer. The mesoderm layer is responsible for forming muscles, connective tissues, and other internal structures. Since cnidarians do not have this layer, they are considered diploblastic. Let's use an example to illustrate this. Imagine you have a triploblastic organism, like a human. In a human, the mesoderm layer gives rise to muscles, which allow us to move. But in cnidarians, since they lack the mesoderm layer, they do not have true muscles. So, to summarize, cnidarians lack triploblastic development because they do not have the mesoderm layer. Instead, they exhibit diploblastic development, with only two germ layers: the ectoderm and the endoderm
b. economic consequences
c. development hindrances
d. all of the above
Answer: d. all of the above
Fossil fuels such as coal, oil and gas are beneficial sources of energy used by the human society. Fossil fuels are non- renewable resources, which are produced after millions of years of geological and biological activity taking place inside the earth crust. Human society is mainly dependent upon the fossil fuels to maintain it's energy needs.
There are some negative consequences associated with fossil fuels:
Environmental consequences: Fossil fuels are used for generation of energy in the power plants and by the automobiles. These sources releases partially and completely combusted products which includes the poisonous gases causing air and water pollution.
Economic consequences: Fossil fuel use is related with economic crisis because fossil fuels are non- renewable resources, which cannot be replenished once used. They are expensive and many commercial energy generation processes are dependent on them such as electricity, transportation and others.
Development hindrances: Large dependence on fossil fuels creating an hindrance on development process. As, there are very few findings which are resulted which could replace the fossil fuels, these finding can be beneficial for the environmental and economic point of view.
A. gorillas
B. chimpanzees
C. bonobos and chimpanzees
D. bonobos and gorillas
Answer: c) bonobos and chimpanzees
B. It causes increased transpiration.
C. It can pollute the groundwater.
D. It increases soil bacteria.
Answer;
Follicle- stimulating hormone (FSH)
Explanation;
-Follicle stimulating hormone is produced by the pituitary gland. It regulates the functions of both the ovaries and testes. Lack or insufficiency of it can cause infertility or sub-fertility both in men and women.
-Follicle stimulating hormone is one of the hormones essential to pubertal development and the function of women’s ovaries and men’s testes.
-In women, this hormone stimulates the growth of ovarian follicles in the ovary before the release of an egg from one follicle at ovulation. It also increases oestradiol production. In men, follicle stimulating hormone acts on the Sertoli cells of the testes to stimulate sperm production.