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Elena-2011 [213]
3 years ago
12

What harmful environment factors should be avoided by pregnant women ? Why ? Please answer this !!

Biology
1 answer:
stellarik [79]3 years ago
3 0

toxic substances can increase the risk for birth defect, miscarriages,etc.

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Gene flow is one force that can cause evolutionary change. Which example best illustrates gene flow?
Readme [11.4K]
Gene flow also know as gene migration is the transfer of genetic variations or characteristics from one population to another. The gene flow can be well illustrated using a flock of geese. A flock of geese migrate and enter into the territory of another flock of geese and start interbreeding. This will result to transfer of the different genes into the off springs.
8 0
3 years ago
Which of the listed relationships between groups is correct?
iren [92.7K]

Answer:

A. Chelicerates are a group of arthropods

E. Sea urchins are a group of echinoderms

B. Gastropods are a group of mollusks

Explanation:

Chelicerates are primitive arthropods having 6 pairs of appendages. 1 oral appendage used for feeding and lack actual mouth parts for chewing up "suck up predigested food". Cephalothorax is the largest and Abdomen contains gills.

Sea urchins are a group of echinoderms as they have spin skin , all marine and found in the bottom of the sea.

Gastropods are the largest and most varied group of molluscs. Gastropod means stomach footed, a typical gastropod is a coiled mass of organs enclosed in a dorsal shell, which rests on the foot having a head ans sensory structures on head and having an operculum.

7 0
3 years ago
If a swimmer cuts his foot on a seashell while wading in the ocean and bleeds into the seawater, his erythrocytes will shrink. w
9966 [12]
If you stay in the water for too long your hand will shrink
6 0
3 years ago
How a change in glycoproteins affects a cell’s ability to maintain homeostasis
Licemer1 [7]

Explanation:

Most of the cell surface receptors and glycoproteins. These glycoproteins have active sites that recognize specific signals, like hormones, that initiate secondary signaling pathways inside of the cell, in response to the external signal. This is how cells respond to environmental stimuli.

If a change in glycoproteins makes them unable to bind signaling molecules (like hormones) or makes them permanently bind these molecules, there will definitely be a defect in how the cell responds to external stimuli.  The cell will be, for example, be unable to respond to insulin in case of elevated blood sugar levels as is the case with diabetics.

Learn More:

For more on glycoproteins check out;

brainly.com/question/11473349

brainly.com/question/13602455

#LearnWithBrainly

8 0
3 years ago
A friend asks you how exocrine glands differ from endocrine glands. She knows that both form from invaginated epithelium. How do
klio [65]

Answer:

Exocrine glands secrete sweat and oil while endocrine glands secrete hormones.

Explanation:

As she knows the endocrine and exocrine glands in respect of their origin from skin, so our answer must be related to the skin so that she can understand easily. So our answer should be as follows -

  • Endocrine glands are those glands which secrete hormones directly to the blood stream but exocrine glands are those glands which secrete sweat and oils directly to the skin surface.
  • A duct is often present in exocrine glands but endocrine glands lack ducts.
4 0
3 years ago
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