BIOLOGY HIGH SCHOOL

Technology best described as :A: A system the government uses to oversee scientist
B; an organized method for doing scientific research
C: the use of science to answer ethical question
D: the application of science to solve practical problems

Answers

Answer 1
Answer: option d. the application of science to solve practical problems

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A solution with a pH of 7.0 isA. acidic.
B. neutral.
C. weakly basic.
D. strongly basic.

Answers

pH 1 is strongly acidic
pH 7 is neutral
pH 14 is strongly basic

How may a gene be defined A. a segment of DNA
B. a segment of a protrein
C. a part of the cell membrane
D. a complete protein

Answers

The answer is (A) a segment of DNA. 
A gene is the very basic unit of heredity, which is found along a segment of DNA, That contributes to phenotype expression. 

The answer is A. a segment of DNA

The jawed fish and all other vertebrates are gnathostomes, which means they have

Answers

Gnathostomes are jawed vertebrates, so they have jaws. 

Define a branch point (also called a node) on a phylogenetic tree and describe what it represents.

Answers

In a rooted phylogenetic tree, each node ... phylogenetic tree that explicitly represents evolutionary time through its branch spans. A spindle diagram (often called

Choose the definition of: InvertebratesA. Having no backbone
B. have a backbone
C. having several backbones
D. having lost a backbone

Answers

The correct option is (a) having no backbone.

Invertebrates are the category of organisms that lack backbone. They have some soft tissues and because of this their body is soft as compared to that of vertebrates. Example: jellyfish and sponges. Some of the invertebrates have outer covering which is very hard called as exoskeleton. This helps them to protect from outer injuries and harsh conditions. Example: cockroach, spiders, etc.
without backbone or having no backbone is considered as INVERTEBRATES.

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An anthropologist finds a fossil that is 4 million years old. Its pelvis suggests it walked upright. Which species could the specimen belong to?Australopithecus africanus
Australopithecus afarensis
Homo habilis
Homo erectus

Answers

Australopithecus afarensis is hominin discovered in the Afar region in Ethiopia. He lived between 4 and 3 million years ago. The most famous fossil is named Lucy. Australopithecus africanus was dated as living between 3.3 and 2 million years ago. Homo habilis is much younger: 2.1 - 1.5 million years ago. Homo erectus is the youngest ( from 1.9 million - 70,000 years ago ). Answer: The specimen could belong to B ) Australopithecus afarensis.
australopithecus afarensis
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A population of bacteria is treated with an antibiotic. It is estimated that 5,000 live bacteria existed in the sample before treatment. After each day of treatment, 40% of the sample remains alive. Which best describes the graph of the function that represents the number of live bacteria after x days of treatment?A. f(x) = 5000(0.4)x, with a horizontal asymptote of y = 0 B. f(x) = 5000(0.6)x, with a vertical asymptote of x = 0 C. f(x) = 5000(1.4)x, with a horizontal asymptote of y = 0 D. f(x) = 5000(1.6)x, with a vertical asymptote of x = 0