<u>Answer:</u>
The part of the the endocrine system is responsible for overseeing and regulating the release of hormones across the entire body is the pituitary glands. The pituitary glands are the major glands that are used to secrete hormones that instruct other glands to secrete hormones for the appropriate conditions.
''Pituitary gland'' is in the size of a pea and it is situated attached to the brain stalk just below the hypothalamus. Since it controls the other glands of the body it is often referred to as the ''master gland''.
Answer:
C) The mass of the nitrogen atoms in the reactants is equal to the mass of the nitrogen atoms in the products.
Explanation:
In a closed system, the mass of reactant is always equal to the mass of products.
"a" is the most probable answer but needs some elaboration.
Spiders eat their food through a process called external digestion. The gut, intestine and esophagus of a spider are designed to take in mostly liquids. The spider regurgitates digestive fluids onto the prey to digest it working more or less as a tenderizer. Once the prey begins to liquefy, it is chewed with the jaws (chelicerae) and the fluid is sucked back into the mouth together with some liquefied "'meat" from the prey.
The spider repeats this process as often as necessary to digest and ingest all but the inedible hard parts.
The correct option is D.
Enzymes are biological catalysts that speed up the rate of biochemical reactions in living cells. Most enzymes are made up of proteins. There are different types of enzymes and each perform specific functions under specified conditions.
7. The correct answer is D, The number of camouflaged guppies in the population would increase while the number of successful mating decreased. The predators will feed on all visible guppies living behind the camouflaging guppies, therefore the number of camouflaged guppies will increase in an effort to keep themselves away from the predators and due to this the off springs will also be more adaptable to the environment by camouflaging.
8. I believe the correct answer is B. Antlers make male moose more likely to attract a mate and pass on the gene for antlers. The antlers can also be used as communication tools, to assert dominance over other males and to fight. In addition when the moose feels threatened it lowers the head and points the antlers at the source of danger as a warning. These adaptable characteristics help the moose to survive, defend itself from other animals and also plays a vital role in reproduction, therefore it is passed to the off springs.
9. The correct answer is B, A. afarensis, A.africanus, H. habilis, H. neanderthalensis. Starting with A. afarensis (smallest brain size) there is a clear increase in both absolute and relative brain size with every successful time period. This is attributed to the activities and tools developed by each stage of evolution. There are many hypothesis attributed to cause a spectacular growth in the brain, e.g. human needed larger brain to develop the precise motor skills, memory, and planning activity required to make tools, develop the greater memory capacity that would make it easier to locate the animals they used to hunt, assimilate and follow the complex rules of their societies.
10. The correct answer is C, Hominids evolved to walk upright on their hind limbs, reducing the need for opposable toes. One of the earliest defining human traits is bipedalism, the ability to walk upright on two legs which evolved over four million years ago. Others include ability to make and use tools and large and complex brain and the capacity for language and culture among others.
11. I believe the answer should be scientific evidence must be found, verified and accepted by the scientific community. A scientific evidence serves to support or counter a scientific theory. the evidence is expected to be empirical evidence and interpretation in accordance with the scientific method. Additionally, scientific evidence relies on data, and it is important for researchers to guarantee that the data they collect is representative of the real situation. It also entails using appropriate methods to collect and analyze data while ensuring that the research is conducted ethically and safely. The data, results and conclusions are then presented in form of a a scientific report, and then this report is studied by other scientists to ascertain the validity of the whole evidence.
12. I think the answer would be finding burial sites of modern H.sapiens in the same region as H. neanderthalensis fossils. This is because Neanderthals are closest to homo sapiens with several defining features of their skulls which include large middle part of the face, angled cheeks, and huge nose for humidifying and warming cold, dry air. They also practiced sophisticated and symbolic behavior unlike other primates before just like homo sapiens which included living in shelters, making sophisticated tools , making and wearing clothes among others