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3 years ago

Which invertebrate is NOT bilaterally symmetrical ?

Biology

1 answer:

Akimi4 [234]3 years ago

3 0

Answer:

Explanation:

Cnidaria (jellyfish, corals)-radial symmetry, true tissues, incomplete digestive system

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What determines the order of elements in today's periodic table??

Sindrei [870]

Answer: the atomic number (number of protons) order the elements.

Explanation: Each element on the Periodic Table has their own configuration of electrons. In order to have a neutral charge, there is an equal number of protons to electrons. Thus, the atomic number (number of protons) order the elements.

4 0

3 years ago

An animal dies and falls into a river. Over time sand, rock, and other material settle on top of the animal remains, completely

marysya [2.9K]

If an animal dies and falls into a river, and over time sand, rock, and other material settle on top of the animal remains, <span>sedimentary rock will be most likely to form because of the layering. </span>

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3 years ago

Read 2 more answers

An AAbb strain is crossed to an aaBB strain and the resulting progeny self-crossed. If A andB are located 10 cM apart from each

skelet666 [1.2K]

Answer:

20.3%

Explanation:

Given that:

An AAbb strain is crossed to an aaBB strain

i.e.

AAbb × aaBB

gametes Ab aB

For F₁

generation;

If the resulting progeny are now self-crossed.

We know that the genetic distance between these two genes on the same chromosome is said to be 10 cM.

i.e. the recombinant gene = 10%; Hence, the parental gene will be (100 - 10)% = 90%

Ab × aB = Aa AB ab Bb

From above; the parental gene;

Ab and aB = 90% with each being 45%

i.e. Ab = 45% and aB = 45%

while the recombinants genes are:

AB and ab = 10%

i.e. AB = 5% and ab = 5%

Finally; the percentage of aaBB is = aB% × aB% × 100%

the percentage of aaBB is = 0.45 × 0.45 × 100%

the percentage of aaBB is = 20.25% ≅ 20.3%

8 0

2 years ago

How did Pangea breakup contribute to evolution

swat32

<span>If a geological barrier (like a continent splitting apart) separates a population of primates, then each population will evolve separately to fit the different conditions of their environments.

As a hypothetical example, if one part of Pangea went north, the primates on that part would adapt to cold temperatures. If the other part went toward the equator, those primates would adapt to heat and direct sunlight. Eventually they would evolve into different species over many generations.</span>

3 0

3 years ago

The Griffith experiment showed that certain strains of Streptococcus bacteria could transform from one strain to another when co

AnnZ [28]

Answer:

The options

A. It suggested that DNA is the

"transforming principle."

B. It confirmed that DNA is a double helix composed of two antiparallel strands.

C. It demonstrated that DNA consists of four nucleotides where the proportions of adenine/thymine and cytosine/guanine remain constant.

D. It proved that DNA is

semiconservative replication.

The CORRECT ANSWER IS A.

A. It suggested that DNA is the

"transforming principle."

Explanation:

A. It suggested that DNA is the

"transforming principle."✔

Griffith's experiments proved

that transformation can be seen in

pneumococcus, but gave no proof based on what molecular background the transformation was

WHILE, the Avery MacLeod-McCarty experiments proved that DNA was THE TRANSFORMING PRINCIPLE.

B. It confirmed that DNA is a double helix composed of two antiparallel strands.❌

These findings were established by James Watson, Francis Crick, Maurice Wilkins and Rosalind Franklin

C. It demonstrated that DNA consists of four nucleotides where the proportions of adenine/thymine and cytosine/guanine remain constant.❌

The findings was established by Erwin Chargaff.

D. It proved that DNA is semiconservative replication.❌

The findings was established by Matt Meselson and Franklin Stahl.

5 0

3 years ago