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3 years ago

In a phospolipid, the heads are which means

Biology

1 answer:

noname [10]3 years ago

4 0

Answer:

A single phospholipid molecule has a phosphate group on one end, called the “head,” and two side-by-side chains of fatty acids that make up the lipid “tails. ” The phosphate group is negatively charged, making the head polar and hydrophilic, or “water loving.” The phosphate heads are thus attracted to the water

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A scientist crossed two pea plants, both having the genotype RrYy. The Punnett square representing the cross is shown in the tab

Shalnov [3]

Parental genotypes: RrYy x RrYy
Offspring genotypes: RRYY, RRYy, RRyy, RrYY, RRyy, rrYY, rrYy, rryy

The conclusion is incorrect because there is a chance that the offspring may have the genotype rryy, in which it has no dominant alleles.

5 0

4 years ago

Amniotes are vertebrates that have protective membranes around their embryos, to provide a watery environment for the developmen

Step2247 [10]

Answer:

-Includes reptiles, birds, and mammals

-All amniotes are tetrapods and vertebrates

-May involve a shelled egg or internal gestation

-Do not need for moist environment for reproduction

-Derived characters that identify an amniotes are 3 extra embryonic membranes: Chorion, Amnion, Allantois

-are Covered by shells

-Most hard and calcified

-Some soft (monotremes)

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4 years ago

Read 2 more answers

After many cell divisions, a segment of DNA has more base pairs than it originally did. Make a claim about how this could happen

Vika [28.1K]

Answer:

It could happen through mutation

Explanation:

A segment of DNA after many cell divisions could have more base pairs than it originally did as a result of mutation.

Mutation is generally defined as a sudden change to the DNA sequence of a cell. This change could be of difference forms, including:

Addition of bases
Deletion of bases
Substitution of bases

Addition of bases to a DNA will generally lead to a longer base pairs in the DNA, deletion will lead to a shorter base pairs while substitution will only lead to a change in the base sequence without any change in the length of the DNA.

6 0

4 years ago

When people work with volatile organic

mixas84 [53]

Answer:

harmful to the lungs........................

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3 years ago

Can you heat alcohol over an open flame. Give reason for your answer

xxMikexx [17]

Answer:

No, you cannot. The problem is that alcohol fumes are flammable. If you heat over an open flame you risk igniting the fumes which will start a chain reactions.

Explanation:

ggl and knowledge

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3 years ago