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Mnenie [13.5K]
3 years ago
15

The startle reflex occurs when

Biology
1 answer:
Phoenix [80]3 years ago
5 0
This startle reflex (aka moro reflex) is/was present in us as newborns.

It's triggered when there's an unexpected reaction. Example: Loud noise, sudden movement.

The baby will tighten his/her body, fling out arms, sort of like giving him/herself a hug. It happens because the baby is trying to protect itself from harm.

It normally leaves thanks to the mother's care, normally 6 weeks after the newborn is born. 
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True or false
erik [133]

Answer:

True

Explanation:

offspring inherits are most likely inherits from parents.

3 0
2 years ago
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Saccharomyces cerevisiae (a yeast species) mutants are available that grow on pyruvate or ethanol, but not sugars or glycerol.
mezya [45]

Answer:

The enzyme is the pyruvate kinase

Explanation:

The designated enzyme can only grow in pyruvate or in ethanol. They are said to be in anaerobic conditions. If the end product of glycolysis is pyruvate and the enzyme that transforms phosphoenol pyruvate into pyruvate is called pyruvate kinase. In a reaction under anaerobic conditions, the pyruvate is transformed into ethanol. So if the pyruvate kinase enzyme is mutated, pyruvate cannot be transformed into ethanol and Saccharomyces cerevisiae could not survive in that medium.

7 0
2 years ago
A plant growing in an area where it is not required is called?
lora16 [44]

Answer:

weed(s)

Explanation:

it’s a plant that is out of place, undesirable, or an annoyance because it interferes with agricultural or animal production.

hope this helped!

8 0
2 years ago
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Describe the control group for an experiment that examines the effect of fire intensity on the biodiversity of tree communities.
Vladimir79 [104]

Answer:

explanation below

Explanation:

The control group would be the biodiversity of the trees without the fire

The control group in the experiment would center on the biodiversity of the trees without the fire. Ideally, both the control group and the experimental groups are usually identical in every way except that the experimental group would receive the treatment that is believed to have an effect on the biodiversity of trees.

7 0
2 years ago
Six fingered offspring are formed from normal parents, why?
Kruka [31]
Dominant' traits will actually disappear faster if they are disadvantageous.

Think about it: if everyone who has even a single copy of a particular allele is at a disadvantage (manifests the phenotype, in this case six fingers), then even single copies are selected against.

In the case of recessive traits, selection occurs only against homozygous carriers, who may be very rare if the allele itself is rare.

A concrete example would be something like Tay-Sachs disease. If the allele that causes this were dominant, every carrier would die before adulthood, and it would occur only as a very rare de novo mutation. But because it is recessive, it persists for now; heterozygous carriers have no disadvantage.

4 0
3 years ago
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