Answer:
The answer is A.
Explanation:
Since only 1 of the options is wrong, i assume you are looking for that one.
Two types of immunity systems, innate immunity and adaptive immunity. Adaptive immunity is formed when it is exposed to a harmful substance, vaccines for example create adaptive immunity.
Innate immunity is present at birth which consists our skin protects us physically, chemical substances in our blood that protect us from bacteria and infections and also our blood cells such as T cells.
Since innate immunity forms one of the first lines of defense in our immune system and is the first to respond to a threat in a few hours down to as little as minutes, it is not slower than adaptive immunity in its response to infections and pathogens.
I hope this answer helps.
Answer:
yes
Explanation:
prokarotic cells are single celled and can procreate on their own
<span>Despite considerable concern about the high rate of
Cocaine use among pregnant women, studies have failed to find a homogeneous pattern of fetal effects, and there is little consensus on the adverse effects of the drug.
</span>
Cocaine<span> is a street
drug that usually comes as a white powder. </span>Cocaine use during pregnancy can affect a pregnant<span> woman and her
unborn baby in many ways.</span>
Answer:
les glandes produisent deux produits essentiels :
-gamètes. les mâles produisent du sperme et les femelles produisent des ovules (œufs). la formation des gamètes dépend d'un type particulier de division cellulaire appelé méiose
-hormones sexuelles. ces hormones stéroïdes - principalement la testostérone chez les hommes, les œstrogènes et la progestérone chez les femmes - jouent un rôle vital à la fois dans le développement et la fonction des organes reproducteurs et dans le comportement et les pulsions sexuelles. ces hormones influencent également la croissance et le développement de nombreux autres organes et tissus du corps
Explanation:
Answer:
Astronomers can use telescopes to look at very distant galaxies. This is how they see what the Universe looked like a long time ago. This is because the light from distant parts of the Universe takes a very long time to reach us. From these observations, it seems the physical laws and constants of the Universe have not changed.
Physicists are currently unsure if anything existed before the Big Bang. They are also unsure whether the size of the Universe is infinite.
