BIOLOGY HIGH SCHOOL

Which of the following does NOT have a part in controlling the balance of an ecosystem?Consumers
Decomposers
Sun
Producers

Answers

Answer 1
Answer: Sun is the correct answer.
.

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20. Why do you see a baseball flying through the air before you hear the crack of the bat hitting it? a. The sound is made as the ball flies through the air.
b. Your eyes react faster than your ears.
c. Light travels faster than sound.
d. Sound travels faster than light.

Answers

The sound is produced when the ball hits the air, that's when we see a baseball flying through the air before we hear the bat hit. So, the correct option is A.

What is Sound?

Sound is defined as the vibration which propagates in the form of an acoustic wave through a transmission medium such as a gas, liquid or solid. Sound is described as the reception of such waves and their perception by the brain.

This is explained as the mechanical disturbance from a state of equilibrium which  propagates through an elastic material medium. The sound is produced when the ball hits the air, that's when we see a baseball flying through the air before we hear the bat hit. Musical instruments also produce sound like the sound produced by guitar, sitar, harmonium etc. is musical sound or music.

Therefore, the correct option is A.

Learn more about Sound, here:

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Answer:

Light travels faster than sound.

Explanation:

In what ways are the three groups of amphibians similar different

Answers

The three groups of amphibians: Salamanders, Frogs, and Caecilians are different because they look different as adults. Salamanders have tails and they have four weak short limbs that allow them to walk instead of jump. Frogs have fours legs with strong hind legs and no tails. Caecilians have no legs and they are burrowing animals.

What are three products first developed for use in space that people now use in their everyday lives?

Answers

Answer:

CCD Technology, actifed tablets and semiconductors

Explanation:

Semiconductors now absolutely used in every electronic device made which earlier were developed in integrated circuits for making reliable electronic devices that were compact and wouldn't fall apart during lift off.

CCD technology was developed to take compact cameras into space which are now sold as digital cameras in every store.

Actifed tablets were developed as a non-drowsy way of combating illness in space which are now sold as an over the counter cold remedy.
Velcro,CD'S,and rubber solid sneakers . Hope this helped ☺️

What type of cells are produced after fertilization occurs and the gametes combine?A) an egg cell
B) a sperm cell
C) a diploid zygote
D) a haploid zygote

Answers

The answer is C. a diploid zygote

A woman who has blood type A positive has a daughter who is type O positive and a son who is type B negative. Rh positive is a trait that shows simple dominance over Rh negative and is designated by the alleles R and r, respectively. A third gene for the MN blood group has codominant alleles M and N. Which of the following is a possible phenotype for the father?
A) A negative
B) O negative
C) B positive
D) AB negative
E) impossible to determine

Answers

The answer is C) B positive.

A mother has either AA or AO genotype. Since her daughter has OO genotype, the one O allele is from a father and one is from the mother.  Thus, mother must have allele O. So mother's genotype is AO.

A mother with AO genotype will pass to her son either A or O allele. Since son is type B negative, it could inherit from mother only O allele. Son's genotype is BO. This means that he inherited from the father B allele.

Father has either BO or BB genotype. Since his daughter has OO genotype, she must inherit one O allele from the father. Thus, the father has BO genotype.

Talking of Rh, her son is type B negative. A negative Rh phenotype contains both recessive alleles r, so the mother must have allele r (she is either Rh+ heterozygous, or Rh- homozygous). The same is with father - he  is either Rh+ heterozygous, or Rh- homozygous.

Which of the following is not a phase of gastric secretion?A. cephalic
B. gastric
C. intestinal
D. enterogastric

Answers

Enterogastric is not a phase of gastric secretion, whereas cephalic, gastric, and intestinal are.
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