Answer:
It is the hypophyseal portal system.
Explanation:
The pea-sized endocrine gland called the pituitary gland or hypophysis secretes hormones that control many functions of the human body such as growth, metabolism, blood pressure regulation, temperature regulation, pregnancy, childbirth, pain relief, breastfeeding, functions of the sex organs, kidneys and thyroid glands. It consists of anterior and posterior lobes and is located at the bottom of the hypothalamus, which controls the release of pituitary hormones.
The anterior pituitary (adenohypophysis) is connected to the hypothalamus by a network of blood vessels called the hypophyseal portal system, which helps in the transport and exchange of hormones between the hypothalamus and anterior pituitary gland. The hypophyseal portal system consists of a network of primary capillaries in the hypothalamus, a group of small vessels (portal venules) that travel down the stalk, and a complex of secondary capillaries in the anterior pituitary. The releasing hormones such as growth hormone-releasing hormone, gonadotropin-releasing hormone, thyrotropin-releasing hormone and corticotropin-releasing hormone produced by the hypothalamus are transported through the primary capillaries and portal venules and diffuse out of the secondary capillaries into the anterior pituitary.
These releasing hormones bind to endocrine cells in the anterior pituitary and regulate their release of hormones. The endocrine cells in the anterior pituitary are somatotropes that secrete human growth hormone, corticotropes which secrete adrenocorticotropin, thyrotropes which secrete a thyroid-stimulating hormone, gonadotropes which secrete gonadotropic hormones (luteinizing hormone and follicle-stimulating hormone) and lactotropes which secrete prolactin.
B. They can be given bacterial DNA to produce a toxin that only works on bugs and other pests.
C. They can be given DNA to allow them to resist harsh conditions.
D. They cannot be modified to be better than organic crops.
The correct option for the modification done that needs to be sprayed with pesticides is option (b) They can be given bacterial DNA to produce a toxin that only works on bugs and other pests.
Here, we deal with the concept of genetically engineered crops, also called "genetically modified organisms" i.e., GMOs. GMOs approach the specific genes from bacteria of other organisms that produce the required toxins that are harmful only to pests that are inserted into the DNA of crops.
GMOs are examined by crops like Bt cotton or Bt corn. They are genetically modified genes from the bacterium Bacillus thuringiensis (Bt), which are produced by the toxic proteins of certain insects. The use of genetically modified organisms is a complex issue related to the potential health effects, environmental impact, regulatory oversight, and many more.
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Answer:
B
Explanation:
The technique of fluorescent microscopy allows the observation of living cells by using fluorescent dyes or proteins to label specific structures or molecules within the cell.
Microscopy is a valuable tool in biology for studying cells and their structures. When it comes to observing living cells, one technique that stands out is fluorescent microscopy. This technique involves using fluorescent dyes or proteins to label specific structures or molecules within the cell. When these labeled structures are illuminated with a specific wavelength of light, they emit fluorescence, which can be captured and visualized using a specialized microscope.
Fluorescent microscopy is particularly useful for studying dynamic processes within living cells. For example, researchers can use fluorescent microscopy to track the localization of proteins within a cell, observe cell division in real-time, or investigate cellular interactions. By labeling specific structures or molecules with fluorescent markers, scientists can gain insights into the behavior and function of living cells.
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DNA comparisons was developed after Darwin's time and have become an important method for studying evolution.
While Darwin was able to make observations of variation and adaptation in different species, he did not have access to the genetic information that DNA provides. It wasn't until the discovery of the structure of DNA in 1953 that scientists began to explore the use of DNA in studying evolution.
Since then, DNA sequencing and comparisons have become increasingly important tools in the study of evolutionary relationships and processes.
In science, DNA comparison is a ground-breaking technology. It has given researchers the ability to compare and contrast DNA samples with previously unheard-of accuracy.
Researchers can learn a great deal about genetic links and diseases as well as create brand-new remedies for illnesses by examining these traits.
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A) 3 sharp-spined:1 spineless
B) 1 sharp-spined:2 dull-spined:1 spineless
C) 1 sharp-spined:1 dull-spined:1 spineless
D) 1 sharp-spined:1 dull-spined
E) 9 sharp-spined:3 dull-spined:4 spineless