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2 years ago

Which two charestics describe a good index fossil

1 answer:

4 0

Answer:A good index fossil is one with four characteristics: it is distinctive, widespread, abundant, and limited in geologic time. Because most fossil-bearing rocks formed in the ocean, the major index fossils are marine organisms. That being said, certain land organisms are useful in young rocks and specific regions.

Explanation:

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A flat area on a mountain is known as ?

stepan [7]

Hello! Mesa, (Portuguese and Spanish for table) is the American English Term for tableland, an elevated area of land with a flat top and sides that are usually steep cliffs. It takes its name from its characteristics table-top shape. It may asl be called a table hill, table-topped hill or table mountain. I hope this helps! :)

5 0

2 years ago

Both euglena (a eukaryote) and cyanobacteria are photosynthetic unicellular organisms found in pond water. The feature that dist

Usimov [2.4K]

Answer:

The presence of the nucleus!

Explanation:

Since it is a Bacteria, they do not have a nuclei. But eukaryotes do.

Both can reproduce(tip: Bacteria is asexual meaning it can reproduce by itself), has a membrane and have ribosomes

3 0

2 years ago

. Which of the following statements is true? Symmetric encryption is faster than asymmetric encryption, and it can be used to pr

romanna [79]

Answer:

Symmetric encryption is faster than asymmetric encryption, but it cannot be used to provide non-repudiation of contracts.

Explanation:

Symmetric encryption is a type of encryption where only one key (a secret key) is used to both encrypt and decrypt electronic information. Symmetric encryption uses a single key that needs to be shared among the people who need to receive the message while asymmetrical encryption uses a pair of public key and a private key to encrypt and decrypt messages when communicating. Symmetric encryption cannot be used for non-repudiation because the key is shared by both parties, making it difficult to prove who created and encrypted the document.

7 0

2 years ago

What can scientists observe over long periods of time to determine the patterns in climate change?

Jobisdone [24]

Answer:

The physical and biological changes that confirm climate warming include the rate of retreat in glaciers around the world, the intensification of rainfall events, changes in the timing of the leafing out of plants and the arrival of spring migrant birds, and the shifting of the range of some species.

Explanation:

6 0

2 years ago

This tutorial will take you step by step through the question. Individuals with the genotypes Aa Bb CC Dd and Aa bb Cc Dd are cr

Mrac [35]

Answer:

The correct answer is -

a) 1/16

b) 1/64

c) 1/32

Explanation:

According to the law of independent assortment, each allele of a particular gene has equal chances of getting inherited into the gametes.

In a Mendelian cross of Aa x Aa would give;

AA = 1/4,

Aa = 2/4 and

aa = 1/4

The result of the cross between AaBb x AaBb would be 1/16 due to the fact that probability is still the same AA = 1/4, BB = 1/4 therefore, AABB = 1/16 = 1/4× 1/4.

Now based on this crossing the following:

AaBbCCDd x AabbCcDd.

Take each allele as individual

Aa x Aa would give; AA = 1/4, Aa = 2/4 and aa = 1/4

Bb x bb would give; BB = 1/2, bb = 1/2

CC x Cc would give; CC = 1/2, Cc = 1/2

Dd x Dd would give; DD = 1/4, Dd = 2/4 and dd = 1/4

Then the probability of progeny of the following would be:

a) the probability of AaBbCcDd = 2/4 x 1/2 x 1/2 x 2/4 = 1/16

b) the probability of aabbCCdd = 1/4 x 1/2 x 1/2 x 1/4 = 1/64

c) the probability of AabbCcDD = 2/4 x 1/2 x 1/2 x 1/4 = 1/32

6 0

2 years ago